./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:21:29,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:21:29,474 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:21:29,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:21:29,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:21:29,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:21:29,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:21:29,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:21:29,494 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:21:29,494 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:21:29,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:21:29,495 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:21:29,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:21:29,495 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:21:29,496 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:21:29,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:21:29,496 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:21:29,497 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:21:29,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:21:29,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:21:29,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:21:29,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:21:29,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:21:29,499 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:21:29,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:21:29,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:21:29,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:21:29,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:21:29,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:21:29,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:21:29,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:21:29,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:21:29,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:21:29,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:21:29,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:21:29,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:21:29,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:21:29,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:21:29,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:21:29,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:21:29,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:21:29,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:21:29,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2024-11-22 01:21:29,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:21:29,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:21:29,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:21:29,797 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:21:29,798 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:21:29,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-11-22 01:21:31,207 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:21:31,382 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:21:31,383 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2024-11-22 01:21:31,391 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b27dd388/d8faea0560ea4457940c25252d36f1a4/FLAGfac6ef10e [2024-11-22 01:21:31,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b27dd388/d8faea0560ea4457940c25252d36f1a4 [2024-11-22 01:21:31,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:21:31,786 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:21:31,787 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:21:31,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:21:31,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:21:31,792 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:21:31" (1/1) ... [2024-11-22 01:21:31,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3636e157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:31, skipping insertion in model container [2024-11-22 01:21:31,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:21:31" (1/1) ... [2024-11-22 01:21:31,811 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:21:32,001 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/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-22 01:21:32,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:21:32,027 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:21:32,036 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/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2024-11-22 01:21:32,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:21:32,058 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:21:32,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32 WrapperNode [2024-11-22 01:21:32,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:21:32,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:21:32,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:21:32,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:21:32,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,108 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2024-11-22 01:21:32,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:21:32,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:21:32,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:21:32,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:21:32,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,146 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]. [2024-11-22 01:21:32,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,154 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:21:32,155 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:21:32,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:21:32,155 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:21:32,155 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (1/1) ... [2024-11-22 01:21:32,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:21:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:32,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 01:21:32,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 01:21:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:21:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-22 01:21:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-22 01:21:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:21:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:21:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:21:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:21:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:21:32,287 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:21:32,288 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:21:32,415 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-22 01:21:32,415 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:21:32,426 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:21:32,426 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 01:21:32,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:21:32 BoogieIcfgContainer [2024-11-22 01:21:32,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:21:32,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:21:32,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:21:32,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:21:32,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:21:31" (1/3) ... [2024-11-22 01:21:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a76d2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:21:32, skipping insertion in model container [2024-11-22 01:21:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:21:32" (2/3) ... [2024-11-22 01:21:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a76d2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:21:32, skipping insertion in model container [2024-11-22 01:21:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:21:32" (3/3) ... [2024-11-22 01:21:32,432 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2024-11-22 01:21:32,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:21:32,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:21:32,482 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:21:32,487 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;@79405af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:21:32,487 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:21:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 01:21:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-22 01:21:32,499 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:32,499 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:32,500 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:32,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2024-11-22 01:21:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211411984] [2024-11-22 01:21:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 01:21:32,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:32,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211411984] [2024-11-22 01:21:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211411984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:32,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383128071] [2024-11-22 01:21:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:32,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:32,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:32,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 01:21:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:32,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-22 01:21:32,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 01:21:32,754 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383128071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:32,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:21:32,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-22 01:21:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540742831] [2024-11-22 01:21:32,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:32,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:21:32,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:32,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:21:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:21:32,782 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:21:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:32,803 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2024-11-22 01:21:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:21:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-22 01:21:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:32,810 INFO L225 Difference]: With dead ends: 67 [2024-11-22 01:21:32,810 INFO L226 Difference]: Without dead ends: 31 [2024-11-22 01:21:32,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:21:32,815 INFO L432 NwaCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:32,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-22 01:21:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-22 01:21:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-22 01:21:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-22 01:21:32,851 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2024-11-22 01:21:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:32,852 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-22 01:21:32,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:21:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-22 01:21:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-22 01:21:32,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:32,855 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:32,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 01:21:33,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-22 01:21:33,057 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:33,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2024-11-22 01:21:33,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:33,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559057163] [2024-11-22 01:21:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 01:21:33,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559057163] [2024-11-22 01:21:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559057163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:33,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:33,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 01:21:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972365254] [2024-11-22 01:21:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:33,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 01:21:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 01:21:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:33,365 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:33,460 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-11-22 01:21:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 01:21:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-22 01:21:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:33,465 INFO L225 Difference]: With dead ends: 50 [2024-11-22 01:21:33,465 INFO L226 Difference]: Without dead ends: 43 [2024-11-22 01:21:33,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:33,467 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:33,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:21:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-22 01:21:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-11-22 01:21:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-22 01:21:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-22 01:21:33,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2024-11-22 01:21:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:33,488 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-22 01:21:33,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-22 01:21:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-22 01:21:33,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:33,489 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:33,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 01:21:33,493 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:33,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2024-11-22 01:21:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525922401] [2024-11-22 01:21:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389376177] [2024-11-22 01:21:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:33,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 01:21:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:33,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 01:21:33,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:33,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:33,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525922401] [2024-11-22 01:21:33,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389376177] [2024-11-22 01:21:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389376177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:33,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:33,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:21:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516346161] [2024-11-22 01:21:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:33,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:33,691 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:33,729 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-11-22 01:21:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:33,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-22 01:21:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:33,730 INFO L225 Difference]: With dead ends: 49 [2024-11-22 01:21:33,730 INFO L226 Difference]: Without dead ends: 47 [2024-11-22 01:21:33,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:33,733 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:33,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-22 01:21:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-22 01:21:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-22 01:21:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-11-22 01:21:33,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2024-11-22 01:21:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:33,746 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-11-22 01:21:33,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-11-22 01:21:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-22 01:21:33,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:33,748 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:33,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 01:21:33,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-22 01:21:33,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:33,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2024-11-22 01:21:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547745866] [2024-11-22 01:21:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 01:21:34,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:34,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547745866] [2024-11-22 01:21:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547745866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:34,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775440604] [2024-11-22 01:21:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:34,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:34,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:34,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 01:21:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:34,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 01:21:34,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 01:21:34,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-22 01:21:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775440604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:21:34,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:21:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-22 01:21:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778864876] [2024-11-22 01:21:34,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:34,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 01:21:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 01:21:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-22 01:21:34,253 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:21:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:34,436 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2024-11-22 01:21:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 01:21:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-22 01:21:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:34,438 INFO L225 Difference]: With dead ends: 99 [2024-11-22 01:21:34,439 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 01:21:34,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:21:34,440 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:34,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 274 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:21:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 01:21:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-11-22 01:21:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 01:21:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2024-11-22 01:21:34,452 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2024-11-22 01:21:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:34,452 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2024-11-22 01:21:34,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 01:21:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2024-11-22 01:21:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 01:21:34,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:34,457 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:34,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 01:21:34,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:34,659 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:34,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2024-11-22 01:21:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69009368] [2024-11-22 01:21:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447706759] [2024-11-22 01:21:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:34,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:34,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:34,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:34,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 01:21:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:34,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 01:21:34,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:34,828 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69009368] [2024-11-22 01:21:34,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447706759] [2024-11-22 01:21:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447706759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:34,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:34,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:21:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54532822] [2024-11-22 01:21:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:34,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:34,829 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 01:21:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:34,907 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-11-22 01:21:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-22 01:21:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:34,914 INFO L225 Difference]: With dead ends: 75 [2024-11-22 01:21:34,914 INFO L226 Difference]: Without dead ends: 73 [2024-11-22 01:21:34,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:34,915 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:34,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:21:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-22 01:21:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-22 01:21:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 01:21:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-22 01:21:34,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2024-11-22 01:21:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:34,946 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-22 01:21:34,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 01:21:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-22 01:21:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-22 01:21:34,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:34,947 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 01:21:35,148 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 [2024-11-22 01:21:35,149 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:35,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2024-11-22 01:21:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757155208] [2024-11-22 01:21:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:35,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758734518] [2024-11-22 01:21:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:35,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:35,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 01:21:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:35,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 01:21:35,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:35,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757155208] [2024-11-22 01:21:35,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758734518] [2024-11-22 01:21:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758734518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:21:35,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:21:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-22 01:21:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511315018] [2024-11-22 01:21:35,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:35,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 01:21:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 01:21:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 01:21:35,497 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:35,631 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2024-11-22 01:21:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 01:21:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-11-22 01:21:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:35,633 INFO L225 Difference]: With dead ends: 107 [2024-11-22 01:21:35,633 INFO L226 Difference]: Without dead ends: 105 [2024-11-22 01:21:35,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 01:21:35,634 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:35,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 205 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:21:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-22 01:21:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-11-22 01:21:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-22 01:21:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2024-11-22 01:21:35,662 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2024-11-22 01:21:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:35,663 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2024-11-22 01:21:35,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2024-11-22 01:21:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-22 01:21:35,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:35,665 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:35,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 01:21:35,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:35,866 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:35,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2024-11-22 01:21:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871003999] [2024-11-22 01:21:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516945372] [2024-11-22 01:21:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:35,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:35,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:35,898 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) [2024-11-22 01:21:35,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 01:21:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:35,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:21:35,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-22 01:21:36,013 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871003999] [2024-11-22 01:21:36,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516945372] [2024-11-22 01:21:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516945372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:36,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:21:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524045878] [2024-11-22 01:21:36,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:36,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:36,016 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-22 01:21:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:36,075 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2024-11-22 01:21:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-22 01:21:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:36,077 INFO L225 Difference]: With dead ends: 147 [2024-11-22 01:21:36,077 INFO L226 Difference]: Without dead ends: 145 [2024-11-22 01:21:36,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:36,078 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:36,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-22 01:21:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-11-22 01:21:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-22 01:21:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2024-11-22 01:21:36,122 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2024-11-22 01:21:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:36,122 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2024-11-22 01:21:36,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-22 01:21:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2024-11-22 01:21:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-22 01:21:36,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:36,123 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:36,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 01:21:36,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:36,328 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:36,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:36,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2024-11-22 01:21:36,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:36,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568400860] [2024-11-22 01:21:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:36,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282732067] [2024-11-22 01:21:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:36,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:36,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:36,352 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) [2024-11-22 01:21:36,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 01:21:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:36,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 01:21:36,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:36,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:36,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568400860] [2024-11-22 01:21:36,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282732067] [2024-11-22 01:21:36,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282732067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:36,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:21:36,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-22 01:21:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873244366] [2024-11-22 01:21:36,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:36,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 01:21:36,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 01:21:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:21:36,588 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 01:21:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:36,741 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2024-11-22 01:21:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 01:21:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-11-22 01:21:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:36,744 INFO L225 Difference]: With dead ends: 152 [2024-11-22 01:21:36,744 INFO L226 Difference]: Without dead ends: 150 [2024-11-22 01:21:36,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:21:36,749 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:36,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:21:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-22 01:21:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-11-22 01:21:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-22 01:21:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2024-11-22 01:21:36,780 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2024-11-22 01:21:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:36,780 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2024-11-22 01:21:36,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 01:21:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2024-11-22 01:21:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-22 01:21:36,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:36,781 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:36,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 01:21:36,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:36,983 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:36,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2024-11-22 01:21:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135104150] [2024-11-22 01:21:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:21:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:36,997 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:21:37,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:21:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135104150] [2024-11-22 01:21:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135104150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824243795] [2024-11-22 01:21:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:21:37,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:37,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:37,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 01:21:37,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:21:37,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:21:37,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 01:21:37,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:21:37,165 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824243795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:37,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:21:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-22 01:21:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424549462] [2024-11-22 01:21:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:37,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 01:21:37,166 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:37,249 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2024-11-22 01:21:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 01:21:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2024-11-22 01:21:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:37,251 INFO L225 Difference]: With dead ends: 186 [2024-11-22 01:21:37,251 INFO L226 Difference]: Without dead ends: 130 [2024-11-22 01:21:37,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 01:21:37,252 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:37,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-22 01:21:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-11-22 01:21:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-22 01:21:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2024-11-22 01:21:37,279 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2024-11-22 01:21:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:37,279 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2024-11-22 01:21:37,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-22 01:21:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2024-11-22 01:21:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-22 01:21:37,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:37,280 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:37,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 01:21:37,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-22 01:21:37,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:37,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2024-11-22 01:21:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:37,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414697397] [2024-11-22 01:21:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:37,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134466649] [2024-11-22 01:21:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:37,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:37,499 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:37,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 01:21:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:37,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:21:37,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-22 01:21:37,570 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:21:37,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414697397] [2024-11-22 01:21:37,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134466649] [2024-11-22 01:21:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134466649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:37,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:37,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:21:37,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998906442] [2024-11-22 01:21:37,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:37,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:37,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:37,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:37,573 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-22 01:21:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:37,622 INFO L93 Difference]: Finished difference Result 180 states and 262 transitions. [2024-11-22 01:21:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2024-11-22 01:21:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:37,624 INFO L225 Difference]: With dead ends: 180 [2024-11-22 01:21:37,624 INFO L226 Difference]: Without dead ends: 178 [2024-11-22 01:21:37,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 01:21:37,625 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:37,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-22 01:21:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-11-22 01:21:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-22 01:21:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2024-11-22 01:21:37,643 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2024-11-22 01:21:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:37,644 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2024-11-22 01:21:37,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-22 01:21:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2024-11-22 01:21:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-22 01:21:37,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:37,645 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:37,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 01:21:37,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 01:21:37,846 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:37,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2024-11-22 01:21:37,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:37,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977585763] [2024-11-22 01:21:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348680517] [2024-11-22 01:21:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:37,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 01:21:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:37,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 01:21:37,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-22 01:21:38,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-22 01:21:38,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:38,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977585763] [2024-11-22 01:21:38,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:38,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348680517] [2024-11-22 01:21:38,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348680517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:21:38,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:21:38,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-22 01:21:38,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720184027] [2024-11-22 01:21:38,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:38,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 01:21:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 01:21:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-22 01:21:38,826 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-22 01:21:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:40,616 INFO L93 Difference]: Finished difference Result 445 states and 665 transitions. [2024-11-22 01:21:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-22 01:21:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 60 [2024-11-22 01:21:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:40,628 INFO L225 Difference]: With dead ends: 445 [2024-11-22 01:21:40,628 INFO L226 Difference]: Without dead ends: 342 [2024-11-22 01:21:40,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-22 01:21:40,630 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:40,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 357 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-22 01:21:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-22 01:21:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-11-22 01:21:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 150 states have (on average 1.2066666666666668) internal successors, (181), 157 states have internal predecessors, (181), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-22 01:21:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 366 transitions. [2024-11-22 01:21:40,710 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 366 transitions. Word has length 60 [2024-11-22 01:21:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:40,710 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 366 transitions. [2024-11-22 01:21:40,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-22 01:21:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 366 transitions. [2024-11-22 01:21:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-22 01:21:40,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:40,711 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:40,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 01:21:40,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-22 01:21:40,916 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:40,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:40,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2024-11-22 01:21:40,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:40,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916771887] [2024-11-22 01:21:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935292655] [2024-11-22 01:21:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:40,953 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:40,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 01:21:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:41,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 01:21:41,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-22 01:21:41,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-22 01:21:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916771887] [2024-11-22 01:21:41,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935292655] [2024-11-22 01:21:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935292655] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:41,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:21:41,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-22 01:21:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327545002] [2024-11-22 01:21:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:41,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:21:41,153 INFO L87 Difference]: Start difference. First operand 256 states and 366 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-22 01:21:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:41,299 INFO L93 Difference]: Finished difference Result 262 states and 371 transitions. [2024-11-22 01:21:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2024-11-22 01:21:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:41,304 INFO L225 Difference]: With dead ends: 262 [2024-11-22 01:21:41,304 INFO L226 Difference]: Without dead ends: 260 [2024-11-22 01:21:41,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 01:21:41,305 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:41,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-22 01:21:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-11-22 01:21:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-22 01:21:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 369 transitions. [2024-11-22 01:21:41,364 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 369 transitions. Word has length 70 [2024-11-22 01:21:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:41,365 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 369 transitions. [2024-11-22 01:21:41,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-22 01:21:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 369 transitions. [2024-11-22 01:21:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-22 01:21:41,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:41,365 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:41,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 01:21:41,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 01:21:41,566 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:41,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2024-11-22 01:21:41,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110016439] [2024-11-22 01:21:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:41,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777037429] [2024-11-22 01:21:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:41,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:41,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 01:21:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:41,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-22 01:21:41,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-22 01:21:42,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-22 01:21:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110016439] [2024-11-22 01:21:42,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777037429] [2024-11-22 01:21:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777037429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:21:42,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:21:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-22 01:21:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255411317] [2024-11-22 01:21:42,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:42,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 01:21:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 01:21:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-22 01:21:42,219 INFO L87 Difference]: Start difference. First operand 260 states and 369 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-22 01:21:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:43,781 INFO L93 Difference]: Finished difference Result 322 states and 459 transitions. [2024-11-22 01:21:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 01:21:43,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 68 [2024-11-22 01:21:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:43,785 INFO L225 Difference]: With dead ends: 322 [2024-11-22 01:21:43,785 INFO L226 Difference]: Without dead ends: 320 [2024-11-22 01:21:43,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 01:21:43,786 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 115 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:43,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 541 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-22 01:21:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-22 01:21:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 268. [2024-11-22 01:21:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.1949685534591195) internal successors, (190), 166 states have internal predecessors, (190), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-22 01:21:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 375 transitions. [2024-11-22 01:21:43,905 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 375 transitions. Word has length 68 [2024-11-22 01:21:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:43,906 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 375 transitions. [2024-11-22 01:21:43,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-22 01:21:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 375 transitions. [2024-11-22 01:21:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-22 01:21:43,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:43,907 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:43,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 01:21:44,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 01:21:44,112 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:44,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2024-11-22 01:21:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159299404] [2024-11-22 01:21:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:21:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:44,125 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:21:44,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:21:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-22 01:21:44,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159299404] [2024-11-22 01:21:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159299404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:21:44,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:21:44,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:21:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757672239] [2024-11-22 01:21:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:21:44,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:21:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:21:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:44,206 INFO L87 Difference]: Start difference. First operand 268 states and 375 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-22 01:21:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:44,359 INFO L93 Difference]: Finished difference Result 459 states and 645 transitions. [2024-11-22 01:21:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:21:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2024-11-22 01:21:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:44,363 INFO L225 Difference]: With dead ends: 459 [2024-11-22 01:21:44,363 INFO L226 Difference]: Without dead ends: 289 [2024-11-22 01:21:44,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:21:44,364 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:44,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:21:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-22 01:21:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 277. [2024-11-22 01:21:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 168 states have (on average 1.1964285714285714) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 15 states have call predecessors, (93), 15 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-22 01:21:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 386 transitions. [2024-11-22 01:21:44,529 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 386 transitions. Word has length 73 [2024-11-22 01:21:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:44,529 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 386 transitions. [2024-11-22 01:21:44,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-22 01:21:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 386 transitions. [2024-11-22 01:21:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-22 01:21:44,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:44,531 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:44,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 01:21:44,531 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:44,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2024-11-22 01:21:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969971348] [2024-11-22 01:21:44,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:21:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:44,561 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-22 01:21:44,562 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:21:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870477623] [2024-11-22 01:21:44,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:21:44,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:44,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:44,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:44,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 01:21:44,632 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 01:21:44,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:21:44,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-22 01:21:44,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-22 01:21:45,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:45,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969971348] [2024-11-22 01:21:45,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:45,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870477623] [2024-11-22 01:21:45,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870477623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:21:45,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:21:45,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-22 01:21:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485590647] [2024-11-22 01:21:45,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:45,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 01:21:45,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 01:21:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:21:45,933 INFO L87 Difference]: Start difference. First operand 277 states and 386 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-22 01:21:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:21:46,710 INFO L93 Difference]: Finished difference Result 344 states and 469 transitions. [2024-11-22 01:21:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 01:21:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2024-11-22 01:21:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:21:46,713 INFO L225 Difference]: With dead ends: 344 [2024-11-22 01:21:46,713 INFO L226 Difference]: Without dead ends: 342 [2024-11-22 01:21:46,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 01:21:46,715 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 67 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 01:21:46,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 406 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 01:21:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-22 01:21:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 332. [2024-11-22 01:21:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 202 states have (on average 1.188118811881188) internal successors, (240), 203 states have internal predecessors, (240), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-22 01:21:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 457 transitions. [2024-11-22 01:21:46,815 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 457 transitions. Word has length 73 [2024-11-22 01:21:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:21:46,815 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 457 transitions. [2024-11-22 01:21:46,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-22 01:21:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 457 transitions. [2024-11-22 01:21:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-22 01:21:46,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:21:46,817 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:21:46,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 01:21:47,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 01:21:47,018 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:21:47,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:21:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2024-11-22 01:21:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:21:47,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172925344] [2024-11-22 01:21:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:21:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:21:47,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781667448] [2024-11-22 01:21:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:21:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:21:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:21:47,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:21:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 01:21:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:21:47,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-22 01:21:47,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:21:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-22 01:21:48,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:21:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-11-22 01:21:49,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:21:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172925344] [2024-11-22 01:21:49,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:21:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781667448] [2024-11-22 01:21:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781667448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:21:49,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:21:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2024-11-22 01:21:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12172369] [2024-11-22 01:21:49,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:21:49,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-22 01:21:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:21:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-22 01:21:49,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2024-11-22 01:21:49,209 INFO L87 Difference]: Start difference. First operand 332 states and 457 transitions. Second operand has 34 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-22 01:22:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:03,877 INFO L93 Difference]: Finished difference Result 588 states and 848 transitions. [2024-11-22 01:22:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-22 01:22:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 87 [2024-11-22 01:22:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:03,880 INFO L225 Difference]: With dead ends: 588 [2024-11-22 01:22:03,880 INFO L226 Difference]: Without dead ends: 580 [2024-11-22 01:22:03,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2167, Invalid=9823, Unknown=0, NotChecked=0, Total=11990 [2024-11-22 01:22:03,883 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 304 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:03,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1159 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-22 01:22:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-11-22 01:22:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 449. [2024-11-22 01:22:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 269 states have (on average 1.2193308550185873) internal successors, (328), 270 states have internal predecessors, (328), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2024-11-22 01:22:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 641 transitions. [2024-11-22 01:22:04,153 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 641 transitions. Word has length 87 [2024-11-22 01:22:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:04,154 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 641 transitions. [2024-11-22 01:22:04,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-22 01:22:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 641 transitions. [2024-11-22 01:22:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-22 01:22:04,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:04,155 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:04,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 01:22:04,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:04,360 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:04,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2024-11-22 01:22:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:04,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066875504] [2024-11-22 01:22:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:22:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:22:04,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663939351] [2024-11-22 01:22:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:22:04,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:04,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:04,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:04,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 01:22:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:22:04,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 01:22:04,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-11-22 01:22:04,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-11-22 01:22:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066875504] [2024-11-22 01:22:04,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:04,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663939351] [2024-11-22 01:22:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663939351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:04,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:04,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-11-22 01:22:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816930571] [2024-11-22 01:22:04,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:04,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 01:22:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 01:22:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-22 01:22:04,949 INFO L87 Difference]: Start difference. First operand 449 states and 641 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-22 01:22:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:07,025 INFO L93 Difference]: Finished difference Result 991 states and 1551 transitions. [2024-11-22 01:22:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-22 01:22:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2024-11-22 01:22:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:07,031 INFO L225 Difference]: With dead ends: 991 [2024-11-22 01:22:07,031 INFO L226 Difference]: Without dead ends: 989 [2024-11-22 01:22:07,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2024-11-22 01:22:07,032 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 156 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:07,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 429 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-22 01:22:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2024-11-22 01:22:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 828. [2024-11-22 01:22:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 429 states have (on average 1.2913752913752914) internal successors, (554), 430 states have internal predecessors, (554), 373 states have call successors, (373), 25 states have call predecessors, (373), 25 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2024-11-22 01:22:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1299 transitions. [2024-11-22 01:22:07,765 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1299 transitions. Word has length 90 [2024-11-22 01:22:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:07,765 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 1299 transitions. [2024-11-22 01:22:07,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-11-22 01:22:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1299 transitions. [2024-11-22 01:22:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-22 01:22:07,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:07,767 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:07,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 01:22:07,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 01:22:07,968 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:07,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2024-11-22 01:22:07,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:07,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959680057] [2024-11-22 01:22:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:22:07,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:22:07,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35453105] [2024-11-22 01:22:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:22:07,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:07,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:07,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 01:22:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:22:08,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-22 01:22:08,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-22 01:22:08,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-22 01:22:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959680057] [2024-11-22 01:22:09,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35453105] [2024-11-22 01:22:09,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35453105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:09,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:09,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-22 01:22:09,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576281188] [2024-11-22 01:22:09,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:09,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 01:22:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 01:22:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-22 01:22:09,260 INFO L87 Difference]: Start difference. First operand 828 states and 1299 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-22 01:22:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:15,224 INFO L93 Difference]: Finished difference Result 1111 states and 1744 transitions. [2024-11-22 01:22:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-22 01:22:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 90 [2024-11-22 01:22:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:15,231 INFO L225 Difference]: With dead ends: 1111 [2024-11-22 01:22:15,235 INFO L226 Difference]: Without dead ends: 1109 [2024-11-22 01:22:15,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2024-11-22 01:22:15,250 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 166 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:15,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 624 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-22 01:22:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2024-11-22 01:22:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1024. [2024-11-22 01:22:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 529 states have (on average 1.2967863894139886) internal successors, (686), 530 states have internal predecessors, (686), 465 states have call successors, (465), 29 states have call predecessors, (465), 29 states have return successors, (464), 464 states have call predecessors, (464), 464 states have call successors, (464) [2024-11-22 01:22:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1615 transitions. [2024-11-22 01:22:16,562 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1615 transitions. Word has length 90 [2024-11-22 01:22:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:16,563 INFO L471 AbstractCegarLoop]: Abstraction has 1024 states and 1615 transitions. [2024-11-22 01:22:16,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-22 01:22:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1615 transitions. [2024-11-22 01:22:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-22 01:22:16,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:16,567 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:16,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 01:22:16,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 01:22:16,772 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:16,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:16,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2024-11-22 01:22:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591781719] [2024-11-22 01:22:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:16,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:16,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-22 01:22:17,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:17,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591781719] [2024-11-22 01:22:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591781719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:22:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542784092] [2024-11-22 01:22:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:17,004 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 01:22:17,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:17,063 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:17,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 01:22:17,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-22 01:22:17,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-22 01:22:17,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542784092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:17,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:22:17,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-22 01:22:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832499836] [2024-11-22 01:22:17,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:17,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 01:22:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 01:22:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-22 01:22:17,266 INFO L87 Difference]: Start difference. First operand 1024 states and 1615 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-22 01:22:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:18,932 INFO L93 Difference]: Finished difference Result 1136 states and 1784 transitions. [2024-11-22 01:22:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 01:22:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2024-11-22 01:22:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:18,939 INFO L225 Difference]: With dead ends: 1136 [2024-11-22 01:22:18,939 INFO L226 Difference]: Without dead ends: 1129 [2024-11-22 01:22:18,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-22 01:22:18,941 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:18,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 387 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 01:22:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-22 01:22:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 993. [2024-11-22 01:22:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 506 states have (on average 1.3043478260869565) internal successors, (660), 507 states have internal predecessors, (660), 457 states have call successors, (457), 29 states have call predecessors, (457), 29 states have return successors, (456), 456 states have call predecessors, (456), 456 states have call successors, (456) [2024-11-22 01:22:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1573 transitions. [2024-11-22 01:22:19,909 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1573 transitions. Word has length 95 [2024-11-22 01:22:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:19,909 INFO L471 AbstractCegarLoop]: Abstraction has 993 states and 1573 transitions. [2024-11-22 01:22:19,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-22 01:22:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1573 transitions. [2024-11-22 01:22:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-22 01:22:19,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:19,910 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:19,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 01:22:20,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:20,111 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:20,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash -577787487, now seen corresponding path program 4 times [2024-11-22 01:22:20,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:20,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898619136] [2024-11-22 01:22:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:22:20,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:20,131 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:22:20,131 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:22:20,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80688396] [2024-11-22 01:22:20,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:22:20,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:20,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:20,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 01:22:20,191 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:22:20,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:20,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-22 01:22:20,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-22 01:22:20,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-22 01:22:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898619136] [2024-11-22 01:22:21,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80688396] [2024-11-22 01:22:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80688396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:21,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-22 01:22:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893605084] [2024-11-22 01:22:21,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:21,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 01:22:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 01:22:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-11-22 01:22:21,785 INFO L87 Difference]: Start difference. First operand 993 states and 1573 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-22 01:22:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:32,469 INFO L93 Difference]: Finished difference Result 1287 states and 2017 transitions. [2024-11-22 01:22:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-22 01:22:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2024-11-22 01:22:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:32,479 INFO L225 Difference]: With dead ends: 1287 [2024-11-22 01:22:32,479 INFO L226 Difference]: Without dead ends: 1285 [2024-11-22 01:22:32,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=589, Invalid=2381, Unknown=0, NotChecked=0, Total=2970 [2024-11-22 01:22:32,482 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 201 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:32,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 538 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-22 01:22:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2024-11-22 01:22:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1179. [2024-11-22 01:22:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 604 states have (on average 1.2980132450331126) internal successors, (784), 605 states have internal predecessors, (784), 537 states have call successors, (537), 37 states have call predecessors, (537), 37 states have return successors, (536), 536 states have call predecessors, (536), 536 states have call successors, (536) [2024-11-22 01:22:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1857 transitions. [2024-11-22 01:22:34,231 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1857 transitions. Word has length 98 [2024-11-22 01:22:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:34,231 INFO L471 AbstractCegarLoop]: Abstraction has 1179 states and 1857 transitions. [2024-11-22 01:22:34,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-22 01:22:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1857 transitions. [2024-11-22 01:22:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-22 01:22:34,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:34,233 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:34,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 01:22:34,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:34,438 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:34,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1084123749, now seen corresponding path program 2 times [2024-11-22 01:22:34,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:34,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635605560] [2024-11-22 01:22:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:34,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:34,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:22:34,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096078263] [2024-11-22 01:22:34,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:34,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:34,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:34,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 01:22:34,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:34,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:34,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 01:22:34,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-22 01:22:35,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-22 01:22:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635605560] [2024-11-22 01:22:35,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096078263] [2024-11-22 01:22:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096078263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:35,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-22 01:22:35,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130204268] [2024-11-22 01:22:35,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:35,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 01:22:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 01:22:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-22 01:22:35,854 INFO L87 Difference]: Start difference. First operand 1179 states and 1857 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-22 01:22:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:42,546 INFO L93 Difference]: Finished difference Result 1367 states and 2131 transitions. [2024-11-22 01:22:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-22 01:22:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 104 [2024-11-22 01:22:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:42,553 INFO L225 Difference]: With dead ends: 1367 [2024-11-22 01:22:42,553 INFO L226 Difference]: Without dead ends: 1359 [2024-11-22 01:22:42,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=994, Invalid=3698, Unknown=0, NotChecked=0, Total=4692 [2024-11-22 01:22:42,554 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 180 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:42,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 852 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-22 01:22:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2024-11-22 01:22:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1333. [2024-11-22 01:22:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 689 states have (on average 1.2960812772133528) internal successors, (893), 690 states have internal predecessors, (893), 601 states have call successors, (601), 42 states have call predecessors, (601), 42 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2024-11-22 01:22:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2094 transitions. [2024-11-22 01:22:44,019 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2094 transitions. Word has length 104 [2024-11-22 01:22:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:44,020 INFO L471 AbstractCegarLoop]: Abstraction has 1333 states and 2094 transitions. [2024-11-22 01:22:44,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-22 01:22:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2094 transitions. [2024-11-22 01:22:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-22 01:22:44,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:44,021 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:44,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-22 01:22:44,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:44,227 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:44,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 3 times [2024-11-22 01:22:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:44,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999530388] [2024-11-22 01:22:44,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:22:44,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:44,258 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-22 01:22:44,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:22:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714389943] [2024-11-22 01:22:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:22:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:44,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:44,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 01:22:44,307 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 01:22:44,307 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:44,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-22 01:22:44,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-22 01:22:44,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-22 01:22:45,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999530388] [2024-11-22 01:22:45,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714389943] [2024-11-22 01:22:45,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714389943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:45,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:45,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-22 01:22:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418456287] [2024-11-22 01:22:45,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:45,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 01:22:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 01:22:45,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-11-22 01:22:45,640 INFO L87 Difference]: Start difference. First operand 1333 states and 2094 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-22 01:22:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:22:52,786 INFO L93 Difference]: Finished difference Result 1546 states and 2424 transitions. [2024-11-22 01:22:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-22 01:22:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 107 [2024-11-22 01:22:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:22:52,795 INFO L225 Difference]: With dead ends: 1546 [2024-11-22 01:22:52,795 INFO L226 Difference]: Without dead ends: 1538 [2024-11-22 01:22:52,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2024-11-22 01:22:52,797 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 214 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:22:52,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 762 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-22 01:22:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2024-11-22 01:22:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1420. [2024-11-22 01:22:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 731 states have (on average 1.2982216142270862) internal successors, (949), 732 states have internal predecessors, (949), 645 states have call successors, (645), 43 states have call predecessors, (645), 43 states have return successors, (644), 644 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-22 01:22:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2238 transitions. [2024-11-22 01:22:54,313 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2238 transitions. Word has length 107 [2024-11-22 01:22:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:22:54,314 INFO L471 AbstractCegarLoop]: Abstraction has 1420 states and 2238 transitions. [2024-11-22 01:22:54,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-22 01:22:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2238 transitions. [2024-11-22 01:22:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-22 01:22:54,315 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:22:54,315 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:22:54,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-22 01:22:54,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-22 01:22:54,520 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:22:54,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:22:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1454845263, now seen corresponding path program 2 times [2024-11-22 01:22:54,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:22:54,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925294230] [2024-11-22 01:22:54,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:54,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:22:54,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:54,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:22:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374864282] [2024-11-22 01:22:54,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:22:54,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:22:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:22:54,545 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:22:54,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 01:22:54,615 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:22:54,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:22:54,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-22 01:22:54,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:22:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 58 proven. 62 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-22 01:22:56,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:22:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-22 01:22:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:22:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925294230] [2024-11-22 01:22:57,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:22:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374864282] [2024-11-22 01:22:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374864282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:22:57,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:22:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2024-11-22 01:22:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837720582] [2024-11-22 01:22:57,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:22:57,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-22 01:22:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:22:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-22 01:22:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-11-22 01:22:57,786 INFO L87 Difference]: Start difference. First operand 1420 states and 2238 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 33 states have internal predecessors, (72), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33)