./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 09:38:32,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 09:38:32,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 09:38:32,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 09:38:32,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 09:38:32,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 09:38:32,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 09:38:32,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 09:38:32,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 09:38:32,863 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 09:38:32,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 09:38:32,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 09:38:32,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 09:38:32,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 09:38:32,867 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 09:38:32,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 09:38:32,867 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 09:38:32,867 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 09:38:32,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 09:38:32,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 09:38:32,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 09:38:32,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 09:38:32,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 09:38:32,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 09:38:32,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 09:38:32,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 09:38:32,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 09:38:32,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 09:38:32,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 09:38:32,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 09:38:32,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 09:38:32,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 09:38:32,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:38:32,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 09:38:32,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 09:38:32,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 09:38:32,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 09:38:32,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 09:38:32,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 09:38:32,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 09:38:32,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 09:38:32,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 09:38:32,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-08 09:38:33,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 09:38:33,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 09:38:33,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 09:38:33,157 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 09:38:33,158 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 09:38:33,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-08 09:38:34,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 09:38:34,849 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 09:38:34,850 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-08 09:38:34,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1b9fc1d5/4f4c364b09a34eedaf93f408535453c8/FLAG786d5933c [2024-11-08 09:38:34,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1b9fc1d5/4f4c364b09a34eedaf93f408535453c8 [2024-11-08 09:38:34,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 09:38:34,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 09:38:34,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 09:38:34,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 09:38:34,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 09:38:34,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:34,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578529a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34, skipping insertion in model container [2024-11-08 09:38:34,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:34,945 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 09:38:35,158 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/array-examples/relax-2-2.i[982,995] [2024-11-08 09:38:35,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:38:35,331 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 09:38:35,345 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/array-examples/relax-2-2.i[982,995] [2024-11-08 09:38:35,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:38:35,409 INFO L204 MainTranslator]: Completed translation [2024-11-08 09:38:35,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35 WrapperNode [2024-11-08 09:38:35,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 09:38:35,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 09:38:35,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 09:38:35,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 09:38:35,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,469 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 140 [2024-11-08 09:38:35,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 09:38:35,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 09:38:35,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 09:38:35,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 09:38:35,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,521 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-08 09:38:35,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 09:38:35,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 09:38:35,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 09:38:35,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 09:38:35,564 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (1/1) ... [2024-11-08 09:38:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:38:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:35,608 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) [2024-11-08 09:38:35,611 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 [2024-11-08 09:38:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 09:38:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 09:38:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 09:38:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 09:38:35,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 09:38:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 09:38:35,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 09:38:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 09:38:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 09:38:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 09:38:35,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 09:38:35,802 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 09:38:35,805 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 09:38:36,154 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-08 09:38:36,154 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 09:38:36,174 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 09:38:36,174 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-08 09:38:36,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:38:36 BoogieIcfgContainer [2024-11-08 09:38:36,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 09:38:36,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 09:38:36,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 09:38:36,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 09:38:36,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 09:38:34" (1/3) ... [2024-11-08 09:38:36,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1984fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:38:36, skipping insertion in model container [2024-11-08 09:38:36,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:35" (2/3) ... [2024-11-08 09:38:36,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1984fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:38:36, skipping insertion in model container [2024-11-08 09:38:36,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:38:36" (3/3) ... [2024-11-08 09:38:36,185 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-08 09:38:36,201 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 09:38:36,201 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 09:38:36,257 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 09:38:36,264 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;@6c7046f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 09:38:36,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 09:38:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:38:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 09:38:36,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,276 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,277 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 321674508, now seen corresponding path program 1 times [2024-11-08 09:38:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013919473] [2024-11-08 09:38:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013919473] [2024-11-08 09:38:36,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013919473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:36,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:36,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 09:38:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475222651] [2024-11-08 09:38:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:36,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 09:38:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 09:38:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:38:36,504 INFO L87 Difference]: Start difference. First operand has 55 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 48 states have internal predecessors, (69), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 09:38:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:36,532 INFO L93 Difference]: Finished difference Result 107 states and 169 transitions. [2024-11-08 09:38:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 09:38:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-08 09:38:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:36,542 INFO L225 Difference]: With dead ends: 107 [2024-11-08 09:38:36,542 INFO L226 Difference]: Without dead ends: 49 [2024-11-08 09:38:36,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:38:36,547 INFO L432 NwaCegarLoop]: 76 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, 76 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 [2024-11-08 09:38:36,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-08 09:38:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-08 09:38:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 43 states have internal predecessors, (55), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 09:38:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-08 09:38:36,578 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 24 [2024-11-08 09:38:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:36,578 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-08 09:38:36,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 09:38:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-08 09:38:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 09:38:36,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,580 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 09:38:36,580 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1775837620, now seen corresponding path program 1 times [2024-11-08 09:38:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878679761] [2024-11-08 09:38:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:36,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:36,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878679761] [2024-11-08 09:38:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878679761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:36,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:36,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:38:36,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152340603] [2024-11-08 09:38:36,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:36,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:38:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:38:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:36,870 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:36,911 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2024-11-08 09:38:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:38:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-08 09:38:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:36,913 INFO L225 Difference]: With dead ends: 73 [2024-11-08 09:38:36,914 INFO L226 Difference]: Without dead ends: 51 [2024-11-08 09:38:36,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:36,916 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:36,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-08 09:38:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-08 09:38:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 09:38:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-08 09:38:36,925 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2024-11-08 09:38:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:36,927 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-08 09:38:36,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-08 09:38:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 09:38:36,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,931 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 09:38:36,931 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1388994825, now seen corresponding path program 1 times [2024-11-08 09:38:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205601869] [2024-11-08 09:38:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:37,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205601869] [2024-11-08 09:38:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205601869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:37,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:37,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 09:38:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038514466] [2024-11-08 09:38:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:37,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 09:38:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 09:38:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 09:38:37,184 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:37,343 INFO L93 Difference]: Finished difference Result 106 states and 144 transitions. [2024-11-08 09:38:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 09:38:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-08 09:38:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:37,346 INFO L225 Difference]: With dead ends: 106 [2024-11-08 09:38:37,346 INFO L226 Difference]: Without dead ends: 72 [2024-11-08 09:38:37,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:38:37,350 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:37,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 274 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-08 09:38:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-11-08 09:38:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 63 states have internal predecessors, (82), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 09:38:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2024-11-08 09:38:37,370 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 27 [2024-11-08 09:38:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:37,371 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2024-11-08 09:38:37,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2024-11-08 09:38:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 09:38:37,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:37,374 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 09:38:37,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 09:38:37,374 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:37,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash -835779302, now seen corresponding path program 1 times [2024-11-08 09:38:37,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000895398] [2024-11-08 09:38:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:37,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000895398] [2024-11-08 09:38:37,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000895398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:37,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:37,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 09:38:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426218333] [2024-11-08 09:38:37,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:37,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 09:38:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 09:38:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:38:37,916 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:38,128 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2024-11-08 09:38:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 09:38:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-08 09:38:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:38,130 INFO L225 Difference]: With dead ends: 109 [2024-11-08 09:38:38,132 INFO L226 Difference]: Without dead ends: 96 [2024-11-08 09:38:38,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 09:38:38,134 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:38,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 366 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-08 09:38:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-11-08 09:38:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 72 states have internal predecessors, (95), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 09:38:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2024-11-08 09:38:38,155 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 28 [2024-11-08 09:38:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:38,155 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2024-11-08 09:38:38,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2024-11-08 09:38:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 09:38:38,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:38,158 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 09:38:38,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 09:38:38,158 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:38,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 339592345, now seen corresponding path program 1 times [2024-11-08 09:38:38,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:38,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413727785] [2024-11-08 09:38:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:38,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:38,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413727785] [2024-11-08 09:38:38,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413727785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851268157] [2024-11-08 09:38:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:38,593 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) [2024-11-08 09:38:38,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 09:38:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:38,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:38:38,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:38,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851268157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:39,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-08 09:38:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514229003] [2024-11-08 09:38:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:39,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 09:38:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 09:38:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-08 09:38:39,297 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:39,855 INFO L93 Difference]: Finished difference Result 203 states and 292 transitions. [2024-11-08 09:38:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 09:38:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-08 09:38:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:39,858 INFO L225 Difference]: With dead ends: 203 [2024-11-08 09:38:39,858 INFO L226 Difference]: Without dead ends: 173 [2024-11-08 09:38:39,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-08 09:38:39,860 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 297 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:39,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 930 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:38:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-08 09:38:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2024-11-08 09:38:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 115 states have (on average 1.4173913043478261) internal successors, (163), 120 states have internal predecessors, (163), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2024-11-08 09:38:39,884 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 29 [2024-11-08 09:38:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:39,886 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2024-11-08 09:38:39,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2024-11-08 09:38:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 09:38:39,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:39,890 INFO L215 NwaCegarLoop]: trace histogram [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, 1] [2024-11-08 09:38:39,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:40,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:40,091 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:40,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1652567176, now seen corresponding path program 1 times [2024-11-08 09:38:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:40,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879798339] [2024-11-08 09:38:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:40,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879798339] [2024-11-08 09:38:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879798339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:40,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:40,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 09:38:40,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464831380] [2024-11-08 09:38:40,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:40,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 09:38:40,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 09:38:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 09:38:40,284 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:40,364 INFO L93 Difference]: Finished difference Result 147 states and 201 transitions. [2024-11-08 09:38:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:38:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-08 09:38:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:40,366 INFO L225 Difference]: With dead ends: 147 [2024-11-08 09:38:40,366 INFO L226 Difference]: Without dead ends: 122 [2024-11-08 09:38:40,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 09:38:40,368 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:40,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 226 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-08 09:38:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2024-11-08 09:38:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 108 states have internal predecessors, (142), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 159 transitions. [2024-11-08 09:38:40,390 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 159 transitions. Word has length 30 [2024-11-08 09:38:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:40,391 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 159 transitions. [2024-11-08 09:38:40,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 159 transitions. [2024-11-08 09:38:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 09:38:40,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:40,392 INFO L215 NwaCegarLoop]: trace histogram [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, 1] [2024-11-08 09:38:40,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 09:38:40,392 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:40,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1208968374, now seen corresponding path program 1 times [2024-11-08 09:38:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:40,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665722276] [2024-11-08 09:38:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:40,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:40,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:40,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665722276] [2024-11-08 09:38:40,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665722276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212915425] [2024-11-08 09:38:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:40,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:40,810 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) [2024-11-08 09:38:40,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 09:38:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:40,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 09:38:40,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:41,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212915425] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:41,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 09:38:41,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 8] total 16 [2024-11-08 09:38:41,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493815500] [2024-11-08 09:38:41,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:41,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:38:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:38:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-08 09:38:41,156 INFO L87 Difference]: Start difference. First operand 116 states and 159 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:41,219 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2024-11-08 09:38:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:38:41,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-08 09:38:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:41,221 INFO L225 Difference]: With dead ends: 139 [2024-11-08 09:38:41,221 INFO L226 Difference]: Without dead ends: 118 [2024-11-08 09:38:41,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-08 09:38:41,224 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:41,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 150 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-08 09:38:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2024-11-08 09:38:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 108 states have internal predecessors, (138), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2024-11-08 09:38:41,243 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 30 [2024-11-08 09:38:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:41,244 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2024-11-08 09:38:41,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2024-11-08 09:38:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 09:38:41,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:41,247 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-08 09:38:41,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:41,447 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,SelfDestructingSolverStorable6 [2024-11-08 09:38:41,448 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:41,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:41,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1229420613, now seen corresponding path program 1 times [2024-11-08 09:38:41,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:41,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133169146] [2024-11-08 09:38:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:41,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,507 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:41,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:41,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133169146] [2024-11-08 09:38:41,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133169146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:41,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:41,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:38:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642665053] [2024-11-08 09:38:41,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:41,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:38:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:38:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:41,512 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:41,528 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2024-11-08 09:38:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:38:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-08 09:38:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:41,530 INFO L225 Difference]: With dead ends: 135 [2024-11-08 09:38:41,530 INFO L226 Difference]: Without dead ends: 102 [2024-11-08 09:38:41,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:41,531 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:41,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-08 09:38:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-08 09:38:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2024-11-08 09:38:41,545 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 31 [2024-11-08 09:38:41,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:41,545 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2024-11-08 09:38:41,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2024-11-08 09:38:41,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 09:38:41,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:41,546 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-08 09:38:41,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 09:38:41,547 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:41,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:41,547 INFO L85 PathProgramCache]: Analyzing trace with hash -640480837, now seen corresponding path program 2 times [2024-11-08 09:38:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843147879] [2024-11-08 09:38:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:41,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:41,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:41,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843147879] [2024-11-08 09:38:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843147879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:41,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835707386] [2024-11-08 09:38:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:38:41,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:41,904 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) [2024-11-08 09:38:41,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 09:38:42,000 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 09:38:42,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:42,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:38:42,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:38:42,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 09:38:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835707386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 09:38:42,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-11-08 09:38:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761923422] [2024-11-08 09:38:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:42,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 09:38:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 09:38:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-08 09:38:42,094 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:42,192 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2024-11-08 09:38:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 09:38:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-08 09:38:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:42,194 INFO L225 Difference]: With dead ends: 110 [2024-11-08 09:38:42,194 INFO L226 Difference]: Without dead ends: 108 [2024-11-08 09:38:42,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:42,195 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:42,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 206 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-08 09:38:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-08 09:38:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.315217391304348) internal successors, (121), 97 states have internal predecessors, (121), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2024-11-08 09:38:42,204 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 31 [2024-11-08 09:38:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:42,204 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2024-11-08 09:38:42,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2024-11-08 09:38:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 09:38:42,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:42,205 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-11-08 09:38:42,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 09:38:42,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:42,410 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:42,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:42,411 INFO L85 PathProgramCache]: Analyzing trace with hash -725981085, now seen corresponding path program 1 times [2024-11-08 09:38:42,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:42,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798663034] [2024-11-08 09:38:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:42,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:42,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798663034] [2024-11-08 09:38:42,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798663034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:42,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:38:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516691149] [2024-11-08 09:38:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:42,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:38:42,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:38:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:42,463 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:42,485 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2024-11-08 09:38:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:38:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-08 09:38:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:42,487 INFO L225 Difference]: With dead ends: 151 [2024-11-08 09:38:42,487 INFO L226 Difference]: Without dead ends: 128 [2024-11-08 09:38:42,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:42,488 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:42,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-08 09:38:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2024-11-08 09:38:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 119 states have internal predecessors, (150), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2024-11-08 09:38:42,502 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 33 [2024-11-08 09:38:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:42,502 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2024-11-08 09:38:42,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2024-11-08 09:38:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 09:38:42,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:42,505 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:42,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 09:38:42,505 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:42,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash 952334873, now seen corresponding path program 1 times [2024-11-08 09:38:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501857623] [2024-11-08 09:38:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:42,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:42,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501857623] [2024-11-08 09:38:42,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501857623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:42,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903805392] [2024-11-08 09:38:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:42,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:42,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:42,719 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) [2024-11-08 09:38:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 09:38:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:42,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 09:38:42,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:43,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:38:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903805392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:43,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:43,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 13] total 25 [2024-11-08 09:38:43,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758545746] [2024-11-08 09:38:43,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:43,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 09:38:43,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 09:38:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:38:43,384 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:43,935 INFO L93 Difference]: Finished difference Result 226 states and 296 transitions. [2024-11-08 09:38:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 09:38:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-08 09:38:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:43,937 INFO L225 Difference]: With dead ends: 226 [2024-11-08 09:38:43,937 INFO L226 Difference]: Without dead ends: 144 [2024-11-08 09:38:43,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 09:38:43,939 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:43,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 791 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:38:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-08 09:38:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2024-11-08 09:38:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 98 states have internal predecessors, (122), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2024-11-08 09:38:43,949 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 37 [2024-11-08 09:38:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:43,949 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2024-11-08 09:38:43,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2024-11-08 09:38:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 09:38:43,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:43,950 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:43,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:44,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:44,151 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:44,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1242146367, now seen corresponding path program 1 times [2024-11-08 09:38:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555148429] [2024-11-08 09:38:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:44,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:44,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:44,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555148429] [2024-11-08 09:38:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555148429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852591188] [2024-11-08 09:38:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:44,313 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) [2024-11-08 09:38:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 09:38:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:44,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 09:38:44,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:44,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852591188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:44,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:44,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2024-11-08 09:38:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877414054] [2024-11-08 09:38:44,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:44,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 09:38:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 09:38:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:44,749 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:44,935 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2024-11-08 09:38:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 09:38:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-08 09:38:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:44,937 INFO L225 Difference]: With dead ends: 146 [2024-11-08 09:38:44,940 INFO L226 Difference]: Without dead ends: 139 [2024-11-08 09:38:44,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:44,941 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:44,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 631 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-11-08 09:38:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2024-11-08 09:38:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 101 states have (on average 1.306930693069307) internal successors, (132), 106 states have internal predecessors, (132), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2024-11-08 09:38:44,955 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 39 [2024-11-08 09:38:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:44,956 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2024-11-08 09:38:44,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2024-11-08 09:38:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 09:38:44,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:44,958 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:44,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 09:38:45,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 09:38:45,159 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:45,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1243993409, now seen corresponding path program 1 times [2024-11-08 09:38:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472614661] [2024-11-08 09:38:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:45,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:45,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:45,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:45,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472614661] [2024-11-08 09:38:45,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472614661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:45,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178784413] [2024-11-08 09:38:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:45,436 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) [2024-11-08 09:38:45,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 09:38:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:45,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 09:38:45,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:38:45,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:38:45,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178784413] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:45,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 09:38:45,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 13 [2024-11-08 09:38:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89553943] [2024-11-08 09:38:45,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:45,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 09:38:45,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:45,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 09:38:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-08 09:38:45,713 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:45,777 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2024-11-08 09:38:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:38:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-08 09:38:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:45,779 INFO L225 Difference]: With dead ends: 137 [2024-11-08 09:38:45,780 INFO L226 Difference]: Without dead ends: 128 [2024-11-08 09:38:45,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-08 09:38:45,781 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 33 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:45,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-08 09:38:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2024-11-08 09:38:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 105 states have (on average 1.3047619047619048) internal successors, (137), 110 states have internal predecessors, (137), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2024-11-08 09:38:45,793 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 39 [2024-11-08 09:38:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:45,794 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2024-11-08 09:38:45,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2024-11-08 09:38:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 09:38:45,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:45,796 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:45,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 09:38:45,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:45,997 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:45,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash -850016227, now seen corresponding path program 1 times [2024-11-08 09:38:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:45,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763866111] [2024-11-08 09:38:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:46,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:46,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:46,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:46,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763866111] [2024-11-08 09:38:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763866111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302134223] [2024-11-08 09:38:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:46,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:46,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:46,296 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) [2024-11-08 09:38:46,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 09:38:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:46,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 09:38:46,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:46,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:46,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302134223] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:46,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 09:38:46,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 7] total 15 [2024-11-08 09:38:46,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781118244] [2024-11-08 09:38:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:46,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 09:38:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 09:38:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:46,710 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:46,771 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2024-11-08 09:38:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:38:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-08 09:38:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:46,773 INFO L225 Difference]: With dead ends: 126 [2024-11-08 09:38:46,774 INFO L226 Difference]: Without dead ends: 117 [2024-11-08 09:38:46,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:46,775 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:46,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-08 09:38:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-08 09:38:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 103 states have (on average 1.3009708737864079) internal successors, (134), 108 states have internal predecessors, (134), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2024-11-08 09:38:46,790 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 41 [2024-11-08 09:38:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:46,791 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2024-11-08 09:38:46,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2024-11-08 09:38:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 09:38:46,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:46,792 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:46,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:46,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:46,997 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:46,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1539771276, now seen corresponding path program 1 times [2024-11-08 09:38:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306842737] [2024-11-08 09:38:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:46,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-08 09:38:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:47,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:47,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306842737] [2024-11-08 09:38:47,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306842737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496232613] [2024-11-08 09:38:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:47,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:47,159 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) [2024-11-08 09:38:47,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 09:38:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 09:38:47,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:47,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 09:38:47,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496232613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:47,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 09:38:47,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2024-11-08 09:38:47,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104481286] [2024-11-08 09:38:47,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:47,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:38:47,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:47,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:38:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 09:38:47,266 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:38:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:47,294 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2024-11-08 09:38:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:38:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-08 09:38:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:47,295 INFO L225 Difference]: With dead ends: 142 [2024-11-08 09:38:47,296 INFO L226 Difference]: Without dead ends: 124 [2024-11-08 09:38:47,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-08 09:38:47,296 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:47,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 118 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-08 09:38:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2024-11-08 09:38:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 107 states have (on average 1.308411214953271) internal successors, (140), 112 states have internal predecessors, (140), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:38:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2024-11-08 09:38:47,306 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 43 [2024-11-08 09:38:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:47,307 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2024-11-08 09:38:47,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:38:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2024-11-08 09:38:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 09:38:47,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:47,307 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:47,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 09:38:47,508 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,SelfDestructingSolverStorable14 [2024-11-08 09:38:47,508 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:47,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1835283646, now seen corresponding path program 1 times [2024-11-08 09:38:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:47,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127102575] [2024-11-08 09:38:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:47,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127102575] [2024-11-08 09:38:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127102575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260841563] [2024-11-08 09:38:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:47,837 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) [2024-11-08 09:38:47,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 09:38:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:47,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 09:38:47,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:48,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:48,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260841563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:48,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:48,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 13] total 29 [2024-11-08 09:38:48,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543601745] [2024-11-08 09:38:48,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:48,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 09:38:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 09:38:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-08 09:38:48,462 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:49,784 INFO L93 Difference]: Finished difference Result 307 states and 415 transitions. [2024-11-08 09:38:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 09:38:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-08 09:38:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:49,786 INFO L225 Difference]: With dead ends: 307 [2024-11-08 09:38:49,786 INFO L226 Difference]: Without dead ends: 231 [2024-11-08 09:38:49,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=2036, Unknown=0, NotChecked=0, Total=2352 [2024-11-08 09:38:49,790 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 255 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:49,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1239 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 09:38:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-08 09:38:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 143. [2024-11-08 09:38:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 128 states have (on average 1.2890625) internal successors, (165), 133 states have internal predecessors, (165), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2024-11-08 09:38:49,811 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 42 [2024-11-08 09:38:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:49,811 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2024-11-08 09:38:49,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2024-11-08 09:38:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 09:38:49,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:49,813 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:49,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:50,014 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,SelfDestructingSolverStorable15 [2024-11-08 09:38:50,014 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:50,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1511968994, now seen corresponding path program 1 times [2024-11-08 09:38:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062306177] [2024-11-08 09:38:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:50,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:50,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:38:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062306177] [2024-11-08 09:38:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062306177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345757196] [2024-11-08 09:38:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:50,168 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) [2024-11-08 09:38:50,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 09:38:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:50,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 09:38:50,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:50,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:38:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345757196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:50,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:50,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-11-08 09:38:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756907197] [2024-11-08 09:38:50,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:50,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 09:38:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 09:38:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:38:50,662 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:51,172 INFO L93 Difference]: Finished difference Result 367 states and 508 transitions. [2024-11-08 09:38:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 09:38:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-08 09:38:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:51,175 INFO L225 Difference]: With dead ends: 367 [2024-11-08 09:38:51,175 INFO L226 Difference]: Without dead ends: 332 [2024-11-08 09:38:51,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-08 09:38:51,180 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 225 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:51,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 771 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:38:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-11-08 09:38:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 175. [2024-11-08 09:38:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 160 states have (on average 1.31875) internal successors, (211), 165 states have internal predecessors, (211), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2024-11-08 09:38:51,204 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 44 [2024-11-08 09:38:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:51,204 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2024-11-08 09:38:51,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2024-11-08 09:38:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 09:38:51,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:51,205 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:51,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 09:38:51,409 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,SelfDestructingSolverStorable16 [2024-11-08 09:38:51,410 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:51,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1510121952, now seen corresponding path program 1 times [2024-11-08 09:38:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:51,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349348643] [2024-11-08 09:38:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:51,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:51,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:51,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:51,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349348643] [2024-11-08 09:38:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349348643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216793229] [2024-11-08 09:38:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:51,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:51,626 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) [2024-11-08 09:38:51,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 09:38:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:51,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 09:38:51,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:51,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216793229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:51,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-08 09:38:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314631709] [2024-11-08 09:38:51,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:51,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 09:38:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 09:38:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:38:51,993 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:52,232 INFO L93 Difference]: Finished difference Result 276 states and 376 transitions. [2024-11-08 09:38:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 09:38:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-08 09:38:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:52,234 INFO L225 Difference]: With dead ends: 276 [2024-11-08 09:38:52,234 INFO L226 Difference]: Without dead ends: 250 [2024-11-08 09:38:52,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-08 09:38:52,235 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 80 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:52,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 591 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-08 09:38:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 168. [2024-11-08 09:38:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.3071895424836601) internal successors, (200), 158 states have internal predecessors, (200), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 219 transitions. [2024-11-08 09:38:52,259 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 219 transitions. Word has length 44 [2024-11-08 09:38:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:52,259 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 219 transitions. [2024-11-08 09:38:52,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 219 transitions. [2024-11-08 09:38:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 09:38:52,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:52,261 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:52,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:52,461 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,SelfDestructingSolverStorable17 [2024-11-08 09:38:52,462 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:52,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -831910624, now seen corresponding path program 1 times [2024-11-08 09:38:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861337711] [2024-11-08 09:38:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:53,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:53,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:38:53,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861337711] [2024-11-08 09:38:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861337711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963027256] [2024-11-08 09:38:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:53,126 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) [2024-11-08 09:38:53,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 09:38:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:53,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-08 09:38:53,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:53,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:38:53,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-08 09:38:53,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-08 09:38:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:53,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:53,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:38:53,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-08 09:38:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:38:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963027256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:54,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 33 [2024-11-08 09:38:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877008193] [2024-11-08 09:38:54,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:54,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 09:38:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 09:38:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 09:38:54,026 INFO L87 Difference]: Start difference. First operand 168 states and 219 transitions. Second operand has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:55,849 INFO L93 Difference]: Finished difference Result 360 states and 487 transitions. [2024-11-08 09:38:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 09:38:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-08 09:38:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:55,851 INFO L225 Difference]: With dead ends: 360 [2024-11-08 09:38:55,851 INFO L226 Difference]: Without dead ends: 311 [2024-11-08 09:38:55,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 09:38:55,852 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 323 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:55,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1594 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 09:38:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-08 09:38:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 196. [2024-11-08 09:38:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 186 states have internal predecessors, (240), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2024-11-08 09:38:55,879 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 44 [2024-11-08 09:38:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:55,879 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2024-11-08 09:38:55,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2024-11-08 09:38:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 09:38:55,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:55,881 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:55,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 09:38:56,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:56,081 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:56,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1037594498, now seen corresponding path program 2 times [2024-11-08 09:38:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:56,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161376490] [2024-11-08 09:38:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:56,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:56,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161376490] [2024-11-08 09:38:56,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161376490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:56,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002365608] [2024-11-08 09:38:56,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:38:56,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:56,445 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) [2024-11-08 09:38:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 09:38:56,543 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 09:38:56,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:56,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 09:38:56,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:38:56,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 09:38:56,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002365608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:56,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 09:38:56,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2024-11-08 09:38:56,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065443119] [2024-11-08 09:38:56,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:56,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 09:38:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 09:38:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:56,712 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:56,808 INFO L93 Difference]: Finished difference Result 263 states and 344 transitions. [2024-11-08 09:38:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:38:56,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-08 09:38:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:56,810 INFO L225 Difference]: With dead ends: 263 [2024-11-08 09:38:56,811 INFO L226 Difference]: Without dead ends: 254 [2024-11-08 09:38:56,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-08 09:38:56,811 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:56,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-08 09:38:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2024-11-08 09:38:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 181 states have (on average 1.3259668508287292) internal successors, (240), 186 states have internal predecessors, (240), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2024-11-08 09:38:56,839 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 46 [2024-11-08 09:38:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:56,839 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2024-11-08 09:38:56,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2024-11-08 09:38:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 09:38:56,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:56,840 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:56,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 09:38:57,044 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,SelfDestructingSolverStorable19 [2024-11-08 09:38:57,045 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:57,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash 82184506, now seen corresponding path program 2 times [2024-11-08 09:38:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:57,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205899383] [2024-11-08 09:38:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:57,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:57,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:57,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 09:38:57,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205899383] [2024-11-08 09:38:57,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205899383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:57,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296923570] [2024-11-08 09:38:57,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:38:57,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:57,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:57,428 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) [2024-11-08 09:38:57,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 09:38:57,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:38:57,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:57,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 09:38:57,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:38:57,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 09:38:57,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296923570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:57,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 24 [2024-11-08 09:38:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500306467] [2024-11-08 09:38:57,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:57,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 09:38:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 09:38:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-11-08 09:38:57,872 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:58,991 INFO L93 Difference]: Finished difference Result 476 states and 651 transitions. [2024-11-08 09:38:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 09:38:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-08 09:38:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:58,995 INFO L225 Difference]: With dead ends: 476 [2024-11-08 09:38:58,996 INFO L226 Difference]: Without dead ends: 461 [2024-11-08 09:38:58,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 09:38:58,998 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 309 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:58,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1509 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 09:38:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-11-08 09:38:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 230. [2024-11-08 09:38:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 215 states have (on average 1.3348837209302327) internal successors, (287), 220 states have internal predecessors, (287), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:38:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 306 transitions. [2024-11-08 09:38:59,033 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 306 transitions. Word has length 46 [2024-11-08 09:38:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:59,034 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 306 transitions. [2024-11-08 09:38:59,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:38:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 306 transitions. [2024-11-08 09:38:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 09:38:59,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:59,035 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:59,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:59,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:59,238 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:59,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash -185711276, now seen corresponding path program 1 times [2024-11-08 09:38:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706450437] [2024-11-08 09:38:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:59,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:38:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:59,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:38:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:38:59,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:59,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706450437] [2024-11-08 09:38:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706450437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:59,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407429248] [2024-11-08 09:38:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:59,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:59,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:59,565 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) [2024-11-08 09:38:59,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 09:38:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:59,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 09:38:59,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:38:59,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:39:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407429248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:00,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:00,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 30 [2024-11-08 09:39:00,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522880686] [2024-11-08 09:39:00,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:00,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 09:39:00,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 09:39:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2024-11-08 09:39:00,496 INFO L87 Difference]: Start difference. First operand 230 states and 306 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:01,256 INFO L93 Difference]: Finished difference Result 563 states and 768 transitions. [2024-11-08 09:39:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 09:39:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-08 09:39:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:01,259 INFO L225 Difference]: With dead ends: 563 [2024-11-08 09:39:01,259 INFO L226 Difference]: Without dead ends: 486 [2024-11-08 09:39:01,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 09:39:01,260 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 218 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:01,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1193 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:39:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-11-08 09:39:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 290. [2024-11-08 09:39:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 275 states have (on average 1.3709090909090909) internal successors, (377), 280 states have internal predecessors, (377), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:39:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 396 transitions. [2024-11-08 09:39:01,300 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 396 transitions. Word has length 47 [2024-11-08 09:39:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:01,301 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 396 transitions. [2024-11-08 09:39:01,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 396 transitions. [2024-11-08 09:39:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-08 09:39:01,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:01,302 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:01,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:01,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:01,502 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:01,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash 934067728, now seen corresponding path program 1 times [2024-11-08 09:39:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:01,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128439296] [2024-11-08 09:39:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:01,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:01,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:01,886 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 09:39:01,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128439296] [2024-11-08 09:39:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128439296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337322782] [2024-11-08 09:39:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:01,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:01,891 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) [2024-11-08 09:39:01,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 09:39:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:02,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 09:39:02,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:39:02,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:39:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337322782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:02,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2024-11-08 09:39:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685816143] [2024-11-08 09:39:02,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:02,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 09:39:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 09:39:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2024-11-08 09:39:02,407 INFO L87 Difference]: Start difference. First operand 290 states and 396 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:03,166 INFO L93 Difference]: Finished difference Result 567 states and 768 transitions. [2024-11-08 09:39:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 09:39:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-08 09:39:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:03,171 INFO L225 Difference]: With dead ends: 567 [2024-11-08 09:39:03,171 INFO L226 Difference]: Without dead ends: 405 [2024-11-08 09:39:03,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 09:39:03,172 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 166 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:03,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1105 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:39:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-08 09:39:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 246. [2024-11-08 09:39:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 231 states have (on average 1.3116883116883118) internal successors, (303), 236 states have internal predecessors, (303), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:39:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 322 transitions. [2024-11-08 09:39:03,214 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 322 transitions. Word has length 47 [2024-11-08 09:39:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:03,215 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 322 transitions. [2024-11-08 09:39:03,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 322 transitions. [2024-11-08 09:39:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 09:39:03,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:03,218 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:03,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 09:39:03,419 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,SelfDestructingSolverStorable22 [2024-11-08 09:39:03,419 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:03,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1166880384, now seen corresponding path program 1 times [2024-11-08 09:39:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:03,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591267248] [2024-11-08 09:39:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:03,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:03,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:03,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 09:39:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:39:03,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:03,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591267248] [2024-11-08 09:39:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591267248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:39:03,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:39:03,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:39:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88059603] [2024-11-08 09:39:03,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:39:03,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:39:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:39:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:39:03,477 INFO L87 Difference]: Start difference. First operand 246 states and 322 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:03,543 INFO L93 Difference]: Finished difference Result 266 states and 346 transitions. [2024-11-08 09:39:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:39:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-08 09:39:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:03,544 INFO L225 Difference]: With dead ends: 266 [2024-11-08 09:39:03,544 INFO L226 Difference]: Without dead ends: 247 [2024-11-08 09:39:03,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:39:03,545 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:03,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 168 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:39:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-08 09:39:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2024-11-08 09:39:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 230 states have (on average 1.3043478260869565) internal successors, (300), 234 states have internal predecessors, (300), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:39:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 319 transitions. [2024-11-08 09:39:03,574 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 319 transitions. Word has length 50 [2024-11-08 09:39:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:03,574 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 319 transitions. [2024-11-08 09:39:03,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 319 transitions. [2024-11-08 09:39:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 09:39:03,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:03,575 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:03,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-08 09:39:03,575 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:03,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -87216089, now seen corresponding path program 1 times [2024-11-08 09:39:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:03,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236576625] [2024-11-08 09:39:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:04,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:04,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:39:04,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236576625] [2024-11-08 09:39:04,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236576625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:04,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886370896] [2024-11-08 09:39:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:04,457 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) [2024-11-08 09:39:04,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 09:39:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:04,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-08 09:39:04,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:04,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:39:05,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-08 09:39:05,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-08 09:39:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 09:39:05,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:05,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:05,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-08 09:39:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 09:39:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886370896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:05,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 39 [2024-11-08 09:39:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500861493] [2024-11-08 09:39:05,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:05,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 09:39:05,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 09:39:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 09:39:05,395 INFO L87 Difference]: Start difference. First operand 245 states and 319 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:05,969 INFO L93 Difference]: Finished difference Result 372 states and 481 transitions. [2024-11-08 09:39:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 09:39:05,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2024-11-08 09:39:05,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:05,971 INFO L225 Difference]: With dead ends: 372 [2024-11-08 09:39:05,971 INFO L226 Difference]: Without dead ends: 282 [2024-11-08 09:39:05,972 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 09:39:05,973 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 96 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:05,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 865 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:39:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-08 09:39:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 256. [2024-11-08 09:39:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 241 states have (on average 1.2946058091286308) internal successors, (312), 245 states have internal predecessors, (312), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 09:39:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 331 transitions. [2024-11-08 09:39:06,012 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 331 transitions. Word has length 49 [2024-11-08 09:39:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:06,012 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 331 transitions. [2024-11-08 09:39:06,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 331 transitions. [2024-11-08 09:39:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 09:39:06,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:06,013 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:06,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:06,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:06,215 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:06,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1732577814, now seen corresponding path program 1 times [2024-11-08 09:39:06,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:06,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536454054] [2024-11-08 09:39:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:06,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 09:39:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-08 09:39:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:39:06,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:06,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536454054] [2024-11-08 09:39:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536454054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:06,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911289004] [2024-11-08 09:39:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:06,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:06,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:06,385 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) [2024-11-08 09:39:06,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 09:39:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:06,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 09:39:06,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:39:06,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:39:06,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911289004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:06,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:06,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-08 09:39:06,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017138028] [2024-11-08 09:39:06,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:06,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 09:39:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 09:39:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-08 09:39:06,654 INFO L87 Difference]: Start difference. First operand 256 states and 331 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-08 09:39:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:06,827 INFO L93 Difference]: Finished difference Result 295 states and 382 transitions. [2024-11-08 09:39:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 09:39:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2024-11-08 09:39:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:06,828 INFO L225 Difference]: With dead ends: 295 [2024-11-08 09:39:06,828 INFO L226 Difference]: Without dead ends: 231 [2024-11-08 09:39:06,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:39:06,829 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 20 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:06,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:39:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-08 09:39:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2024-11-08 09:39:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 211 states have (on average 1.3127962085308056) internal successors, (277), 214 states have internal predecessors, (277), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:39:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2024-11-08 09:39:06,860 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 53 [2024-11-08 09:39:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:06,860 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2024-11-08 09:39:06,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-08 09:39:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2024-11-08 09:39:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 09:39:06,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:06,862 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:06,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:07,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:07,062 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:07,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash -655358406, now seen corresponding path program 2 times [2024-11-08 09:39:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174874808] [2024-11-08 09:39:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:07,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:07,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:39:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174874808] [2024-11-08 09:39:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174874808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856126361] [2024-11-08 09:39:07,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:39:07,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:07,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:07,456 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) [2024-11-08 09:39:07,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 09:39:07,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:39:07,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:07,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 09:39:07,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:07,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856126361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:08,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:08,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2024-11-08 09:39:08,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087825855] [2024-11-08 09:39:08,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:08,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 09:39:08,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 09:39:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-08 09:39:08,017 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:08,787 INFO L93 Difference]: Finished difference Result 405 states and 532 transitions. [2024-11-08 09:39:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 09:39:08,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2024-11-08 09:39:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:08,790 INFO L225 Difference]: With dead ends: 405 [2024-11-08 09:39:08,790 INFO L226 Difference]: Without dead ends: 396 [2024-11-08 09:39:08,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1549, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 09:39:08,791 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 165 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:08,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1331 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:39:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-08 09:39:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 198. [2024-11-08 09:39:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 185 states have (on average 1.2972972972972974) internal successors, (240), 188 states have internal predecessors, (240), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:39:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2024-11-08 09:39:08,830 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 53 [2024-11-08 09:39:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:08,830 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2024-11-08 09:39:08,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2024-11-08 09:39:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 09:39:08,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:08,831 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:08,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 09:39:09,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:09,036 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:09,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash -439774428, now seen corresponding path program 1 times [2024-11-08 09:39:09,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:09,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922456695] [2024-11-08 09:39:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-08 09:39:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-08 09:39:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-08 09:39:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922456695] [2024-11-08 09:39:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922456695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827469164] [2024-11-08 09:39:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:09,230 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) [2024-11-08 09:39:09,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 09:39:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:09,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 09:39:09,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:39:09,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-08 09:39:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827469164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:09,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:09,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-08 09:39:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528979453] [2024-11-08 09:39:09,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:09,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 09:39:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 09:39:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-08 09:39:09,537 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-08 09:39:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:09,819 INFO L93 Difference]: Finished difference Result 270 states and 349 transitions. [2024-11-08 09:39:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 09:39:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2024-11-08 09:39:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:09,821 INFO L225 Difference]: With dead ends: 270 [2024-11-08 09:39:09,821 INFO L226 Difference]: Without dead ends: 216 [2024-11-08 09:39:09,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-08 09:39:09,822 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:09,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 431 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:39:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-08 09:39:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2024-11-08 09:39:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.293103448275862) internal successors, (225), 177 states have internal predecessors, (225), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 240 transitions. [2024-11-08 09:39:09,855 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 240 transitions. Word has length 56 [2024-11-08 09:39:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:09,855 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 240 transitions. [2024-11-08 09:39:09,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-08 09:39:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 240 transitions. [2024-11-08 09:39:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 09:39:09,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:09,856 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:09,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 09:39:10,060 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,SelfDestructingSolverStorable27 [2024-11-08 09:39:10,061 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:10,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2013657349, now seen corresponding path program 3 times [2024-11-08 09:39:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257552312] [2024-11-08 09:39:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:10,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:10,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:39:10,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:10,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257552312] [2024-11-08 09:39:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257552312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785346803] [2024-11-08 09:39:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:39:10,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:10,960 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) [2024-11-08 09:39:10,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 09:39:11,105 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 09:39:11,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:11,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 09:39:11,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:11,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:39:11,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-08 09:39:11,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-08 09:39:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:39:11,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:11,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:11,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-08 09:39:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:39:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785346803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:11,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:11,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 33 [2024-11-08 09:39:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212708681] [2024-11-08 09:39:11,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:11,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 09:39:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 09:39:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 09:39:11,855 INFO L87 Difference]: Start difference. First operand 186 states and 240 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:12,642 INFO L93 Difference]: Finished difference Result 332 states and 438 transitions. [2024-11-08 09:39:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 09:39:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-08 09:39:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:12,644 INFO L225 Difference]: With dead ends: 332 [2024-11-08 09:39:12,644 INFO L226 Difference]: Without dead ends: 283 [2024-11-08 09:39:12,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 09:39:12,645 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 132 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:12,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1433 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 09:39:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-08 09:39:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 210. [2024-11-08 09:39:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 198 states have (on average 1.297979797979798) internal successors, (257), 201 states have internal predecessors, (257), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 272 transitions. [2024-11-08 09:39:12,694 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 272 transitions. Word has length 54 [2024-11-08 09:39:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:12,694 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 272 transitions. [2024-11-08 09:39:12,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 272 transitions. [2024-11-08 09:39:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 09:39:12,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:12,695 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:12,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:12,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 09:39:12,900 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:12,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2082659085, now seen corresponding path program 1 times [2024-11-08 09:39:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:12,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091416016] [2024-11-08 09:39:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:13,123 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:13,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:39:13,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:13,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091416016] [2024-11-08 09:39:13,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091416016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:13,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448537076] [2024-11-08 09:39:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:13,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:13,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:13,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 09:39:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:13,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 09:39:13,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:39:13,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:39:13,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448537076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:13,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:13,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-11-08 09:39:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239105131] [2024-11-08 09:39:13,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:13,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 09:39:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 09:39:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-08 09:39:13,590 INFO L87 Difference]: Start difference. First operand 210 states and 272 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:13,917 INFO L93 Difference]: Finished difference Result 457 states and 595 transitions. [2024-11-08 09:39:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 09:39:13,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-08 09:39:13,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:13,919 INFO L225 Difference]: With dead ends: 457 [2024-11-08 09:39:13,919 INFO L226 Difference]: Without dead ends: 421 [2024-11-08 09:39:13,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:39:13,920 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 57 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:13,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1059 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:39:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-08 09:39:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 253. [2024-11-08 09:39:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 241 states have (on average 1.3070539419087137) internal successors, (315), 244 states have internal predecessors, (315), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 330 transitions. [2024-11-08 09:39:13,959 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 330 transitions. Word has length 54 [2024-11-08 09:39:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:13,959 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 330 transitions. [2024-11-08 09:39:13,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 330 transitions. [2024-11-08 09:39:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 09:39:13,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:13,960 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2024-11-08 09:39:13,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 09:39:14,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:14,161 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:14,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -533951995, now seen corresponding path program 3 times [2024-11-08 09:39:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730894911] [2024-11-08 09:39:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:14,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:14,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:39:14,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730894911] [2024-11-08 09:39:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730894911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081634319] [2024-11-08 09:39:14,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:39:14,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:14,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:14,337 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:14,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 09:39:14,585 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 09:39:14,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:14,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 09:39:14,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:14,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:14,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081634319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:14,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:14,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-08 09:39:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378403664] [2024-11-08 09:39:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:14,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 09:39:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 09:39:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-08 09:39:14,901 INFO L87 Difference]: Start difference. First operand 253 states and 330 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:15,325 INFO L93 Difference]: Finished difference Result 364 states and 465 transitions. [2024-11-08 09:39:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 09:39:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2024-11-08 09:39:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:15,326 INFO L225 Difference]: With dead ends: 364 [2024-11-08 09:39:15,326 INFO L226 Difference]: Without dead ends: 285 [2024-11-08 09:39:15,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-08 09:39:15,327 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:15,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1017 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:39:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-08 09:39:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 253. [2024-11-08 09:39:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 241 states have (on average 1.2946058091286308) internal successors, (312), 244 states have internal predecessors, (312), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 327 transitions. [2024-11-08 09:39:15,362 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 327 transitions. Word has length 55 [2024-11-08 09:39:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:15,362 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 327 transitions. [2024-11-08 09:39:15,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 21 states have internal predecessors, (90), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 327 transitions. [2024-11-08 09:39:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 09:39:15,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:15,363 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:15,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 09:39:15,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:15,564 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:15,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash 82386923, now seen corresponding path program 2 times [2024-11-08 09:39:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:15,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977929834] [2024-11-08 09:39:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:15,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:15,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 09:39:15,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977929834] [2024-11-08 09:39:15,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977929834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:15,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639910591] [2024-11-08 09:39:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:39:15,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:15,978 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:15,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 09:39:16,092 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:39:16,092 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:16,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 09:39:16,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:16,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 09:39:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639910591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:16,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:16,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 27 [2024-11-08 09:39:16,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608483781] [2024-11-08 09:39:16,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:16,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 09:39:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 09:39:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-11-08 09:39:16,446 INFO L87 Difference]: Start difference. First operand 253 states and 327 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:17,100 INFO L93 Difference]: Finished difference Result 416 states and 541 transitions. [2024-11-08 09:39:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 09:39:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2024-11-08 09:39:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:17,102 INFO L225 Difference]: With dead ends: 416 [2024-11-08 09:39:17,102 INFO L226 Difference]: Without dead ends: 320 [2024-11-08 09:39:17,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 09:39:17,103 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 302 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:17,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1092 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:39:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-08 09:39:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 236. [2024-11-08 09:39:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.28125) internal successors, (287), 227 states have internal predecessors, (287), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 302 transitions. [2024-11-08 09:39:17,150 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 302 transitions. Word has length 56 [2024-11-08 09:39:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:17,150 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 302 transitions. [2024-11-08 09:39:17,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-08 09:39:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 302 transitions. [2024-11-08 09:39:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 09:39:17,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:17,151 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:17,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:17,352 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:17,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1120440094, now seen corresponding path program 1 times [2024-11-08 09:39:17,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:17,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486076169] [2024-11-08 09:39:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:17,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:17,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:17,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 09:39:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:17,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-08 09:39:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:39:17,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486076169] [2024-11-08 09:39:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486076169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641576000] [2024-11-08 09:39:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:17,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:17,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:17,975 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:17,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 09:39:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:18,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-08 09:39:18,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:22,320 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2024-11-08 09:39:22,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 09:39:22,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 09:39:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:22,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:22,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:22,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2024-11-08 09:39:22,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:22,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-08 09:39:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:22,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641576000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:22,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:22,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2024-11-08 09:39:22,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355049787] [2024-11-08 09:39:22,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:22,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 09:39:22,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 09:39:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=839, Unknown=1, NotChecked=58, Total=992 [2024-11-08 09:39:22,804 INFO L87 Difference]: Start difference. First operand 236 states and 302 transitions. Second operand has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-08 09:39:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:24,680 INFO L93 Difference]: Finished difference Result 377 states and 483 transitions. [2024-11-08 09:39:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-08 09:39:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 59 [2024-11-08 09:39:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:24,683 INFO L225 Difference]: With dead ends: 377 [2024-11-08 09:39:24,683 INFO L226 Difference]: Without dead ends: 338 [2024-11-08 09:39:24,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=376, Invalid=2707, Unknown=1, NotChecked=108, Total=3192 [2024-11-08 09:39:24,684 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 176 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:24,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1300 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1221 Invalid, 0 Unknown, 317 Unchecked, 0.7s Time] [2024-11-08 09:39:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-08 09:39:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 252. [2024-11-08 09:39:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 238 states have (on average 1.2563025210084033) internal successors, (299), 241 states have internal predecessors, (299), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:39:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 316 transitions. [2024-11-08 09:39:24,735 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 316 transitions. Word has length 59 [2024-11-08 09:39:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:24,735 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 316 transitions. [2024-11-08 09:39:24,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 32 states have internal predecessors, (98), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-08 09:39:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 316 transitions. [2024-11-08 09:39:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 09:39:24,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:24,736 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:24,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-08 09:39:24,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-08 09:39:24,941 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:24,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:24,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1581348927, now seen corresponding path program 4 times [2024-11-08 09:39:24,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:24,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755978589] [2024-11-08 09:39:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:24,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:25,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:25,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:39:25,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755978589] [2024-11-08 09:39:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755978589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148587991] [2024-11-08 09:39:25,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:39:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:25,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:25,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 09:39:25,634 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:39:25,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:25,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 09:39:25,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:39:26,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148587991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:26,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:26,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2024-11-08 09:39:26,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942166573] [2024-11-08 09:39:26,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:26,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-08 09:39:26,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-08 09:39:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2024-11-08 09:39:26,579 INFO L87 Difference]: Start difference. First operand 252 states and 316 transitions. Second operand has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:28,556 INFO L93 Difference]: Finished difference Result 524 states and 668 transitions. [2024-11-08 09:39:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 09:39:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-08 09:39:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:28,559 INFO L225 Difference]: With dead ends: 524 [2024-11-08 09:39:28,559 INFO L226 Difference]: Without dead ends: 439 [2024-11-08 09:39:28,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=510, Invalid=3912, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 09:39:28,561 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 360 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:28,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1593 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 09:39:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-08 09:39:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 318. [2024-11-08 09:39:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 304 states have (on average 1.2894736842105263) internal successors, (392), 307 states have internal predecessors, (392), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-08 09:39:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 409 transitions. [2024-11-08 09:39:28,628 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 409 transitions. Word has length 57 [2024-11-08 09:39:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:28,628 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 409 transitions. [2024-11-08 09:39:28,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8536585365853657) internal successors, (117), 41 states have internal predecessors, (117), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 409 transitions. [2024-11-08 09:39:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 09:39:28,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:28,631 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:28,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:28,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-08 09:39:28,836 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:28,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1906541026, now seen corresponding path program 1 times [2024-11-08 09:39:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:28,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941737794] [2024-11-08 09:39:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:28,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-08 09:39:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-08 09:39:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:39:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941737794] [2024-11-08 09:39:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941737794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104966065] [2024-11-08 09:39:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:29,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:29,320 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:29,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 09:39:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:29,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 09:39:29,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 09:39:29,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-08 09:39:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104966065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:29,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:29,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 32 [2024-11-08 09:39:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719744326] [2024-11-08 09:39:29,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:29,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 09:39:29,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 09:39:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2024-11-08 09:39:29,915 INFO L87 Difference]: Start difference. First operand 318 states and 409 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-08 09:39:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:31,949 INFO L93 Difference]: Finished difference Result 777 states and 1008 transitions. [2024-11-08 09:39:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-08 09:39:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-11-08 09:39:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:31,952 INFO L225 Difference]: With dead ends: 777 [2024-11-08 09:39:31,952 INFO L226 Difference]: Without dead ends: 696 [2024-11-08 09:39:31,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=682, Invalid=5018, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 09:39:31,954 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 510 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:31,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1216 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 09:39:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2024-11-08 09:39:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 337. [2024-11-08 09:39:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 324 states have (on average 1.2746913580246915) internal successors, (413), 326 states have internal predecessors, (413), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 428 transitions. [2024-11-08 09:39:32,038 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 428 transitions. Word has length 60 [2024-11-08 09:39:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:32,038 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 428 transitions. [2024-11-08 09:39:32,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-08 09:39:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 428 transitions. [2024-11-08 09:39:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 09:39:32,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:32,040 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-08 09:39:32,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 09:39:32,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-08 09:39:32,241 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:32,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1648021462, now seen corresponding path program 3 times [2024-11-08 09:39:32,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:32,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188436812] [2024-11-08 09:39:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:33,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:33,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:33,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:33,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188436812] [2024-11-08 09:39:33,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188436812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:33,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932569478] [2024-11-08 09:39:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:39:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:33,258 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:33,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 09:39:33,539 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 09:39:33,539 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:33,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 09:39:33,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:34,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 09:39:34,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 09:39:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-08 09:39:34,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:34,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:34,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2024-11-08 09:39:34,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:34,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-08 09:39:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-08 09:39:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932569478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:34,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 37 [2024-11-08 09:39:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751520820] [2024-11-08 09:39:34,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:34,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 09:39:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 09:39:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 09:39:34,502 INFO L87 Difference]: Start difference. First operand 337 states and 428 transitions. Second operand has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:35,858 INFO L93 Difference]: Finished difference Result 610 states and 788 transitions. [2024-11-08 09:39:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 09:39:35,858 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-08 09:39:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:35,860 INFO L225 Difference]: With dead ends: 610 [2024-11-08 09:39:35,860 INFO L226 Difference]: Without dead ends: 478 [2024-11-08 09:39:35,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 09:39:35,862 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 264 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:35,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 880 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 09:39:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2024-11-08 09:39:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 345. [2024-11-08 09:39:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 332 states have (on average 1.2620481927710843) internal successors, (419), 334 states have internal predecessors, (419), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 434 transitions. [2024-11-08 09:39:35,949 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 434 transitions. Word has length 59 [2024-11-08 09:39:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:35,950 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 434 transitions. [2024-11-08 09:39:35,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 434 transitions. [2024-11-08 09:39:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 09:39:35,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:35,952 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-08 09:39:35,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-08 09:39:36,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:36,153 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:36,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash 109992346, now seen corresponding path program 4 times [2024-11-08 09:39:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557219594] [2024-11-08 09:39:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:37,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:37,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:37,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:37,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557219594] [2024-11-08 09:39:37,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557219594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980476415] [2024-11-08 09:39:37,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:39:37,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:37,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:37,169 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:37,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 09:39:37,297 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:39:37,297 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:37,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-08 09:39:37,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:37,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:39:38,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-08 09:39:38,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-08 09:39:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 09:39:38,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:38,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:38,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-08 09:39:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 09:39:38,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980476415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:38,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:38,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 17] total 56 [2024-11-08 09:39:38,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986419081] [2024-11-08 09:39:38,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:38,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-08 09:39:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-08 09:39:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2818, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 09:39:38,725 INFO L87 Difference]: Start difference. First operand 345 states and 434 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:40,640 INFO L93 Difference]: Finished difference Result 466 states and 588 transitions. [2024-11-08 09:39:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 09:39:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-08 09:39:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:40,642 INFO L225 Difference]: With dead ends: 466 [2024-11-08 09:39:40,642 INFO L226 Difference]: Without dead ends: 425 [2024-11-08 09:39:40,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=641, Invalid=6001, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 09:39:40,644 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 255 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:40,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1021 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 09:39:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-08 09:39:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 357. [2024-11-08 09:39:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 344 states have (on average 1.252906976744186) internal successors, (431), 346 states have internal predecessors, (431), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 446 transitions. [2024-11-08 09:39:40,741 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 446 transitions. Word has length 59 [2024-11-08 09:39:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:40,741 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 446 transitions. [2024-11-08 09:39:40,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 54 states have internal predecessors, (125), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 09:39:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 446 transitions. [2024-11-08 09:39:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 09:39:40,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:40,743 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-08 09:39:40,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-08 09:39:40,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-08 09:39:40,944 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:40,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1040499838, now seen corresponding path program 5 times [2024-11-08 09:39:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925869992] [2024-11-08 09:39:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:40,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:42,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:42,010 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:39:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925869992] [2024-11-08 09:39:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925869992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321108823] [2024-11-08 09:39:42,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:39:42,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:42,014 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:42,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 09:39:42,255 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 09:39:42,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:39:42,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-08 09:39:42,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:42,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-08 09:39:43,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-08 09:39:43,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-08 09:39:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 09:39:43,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:43,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:43,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-08 09:39:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 09:39:44,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321108823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:44,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:44,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 55 [2024-11-08 09:39:44,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007989992] [2024-11-08 09:39:44,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:44,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 09:39:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:44,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 09:39:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 09:39:44,203 INFO L87 Difference]: Start difference. First operand 357 states and 446 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 09:39:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:39:45,633 INFO L93 Difference]: Finished difference Result 545 states and 689 transitions. [2024-11-08 09:39:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 09:39:45,633 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 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 59 [2024-11-08 09:39:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:39:45,635 INFO L225 Difference]: With dead ends: 545 [2024-11-08 09:39:45,635 INFO L226 Difference]: Without dead ends: 424 [2024-11-08 09:39:45,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=448, Invalid=3974, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 09:39:45,636 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 150 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 09:39:45,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1085 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 09:39:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-08 09:39:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 381. [2024-11-08 09:39:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 368 states have (on average 1.252717391304348) internal successors, (461), 370 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-08 09:39:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 476 transitions. [2024-11-08 09:39:45,702 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 476 transitions. Word has length 59 [2024-11-08 09:39:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:39:45,703 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 476 transitions. [2024-11-08 09:39:45,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 53 states have internal predecessors, (120), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 09:39:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 476 transitions. [2024-11-08 09:39:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-08 09:39:45,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:39:45,704 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:39:45,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-08 09:39:45,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-08 09:39:45,905 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:39:45,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:39:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash 86836948, now seen corresponding path program 1 times [2024-11-08 09:39:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:39:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125284226] [2024-11-08 09:39:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:39:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 09:39:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-08 09:39:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 09:39:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-08 09:39:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:39:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:39:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125284226] [2024-11-08 09:39:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125284226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:39:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218839753] [2024-11-08 09:39:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:39:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:39:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:39:46,554 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:39:46,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-08 09:39:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:39:46,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-08 09:39:46,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:39:46,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:39:47,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 09:39:47,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-08 09:39:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 09:39:47,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:39:47,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:39:47,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-08 09:39:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:39:47,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218839753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:39:47,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:39:47,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 29 [2024-11-08 09:39:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885094662] [2024-11-08 09:39:47,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:39:47,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 09:39:47,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:39:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 09:39:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-08 09:39:47,388 INFO L87 Difference]: Start difference. First operand 381 states and 476 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8)