./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/loop-simple/deep-nested.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:24:21,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:24:21,596 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:24:21,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:24:21,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:24:21,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:24:21,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:24:21,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:24:21,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:24:21,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:24:21,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:24:21,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:24:21,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:24:21,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:24:21,630 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:24:21,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:24:21,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:24:21,630 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:24:21,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:24:21,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:24:21,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:24:21,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:24:21,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:24:21,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:24:21,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:24:21,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:24:21,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:24:21,636 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:24:21,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:24:21,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:24:21,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:24:21,638 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:24:21,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2024-11-09 22:24:21,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:24:21,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:24:21,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:24:21,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:24:21,840 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:24:21,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2024-11-09 22:24:23,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:24:23,170 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:24:23,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2024-11-09 22:24:23,176 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaae54dba/331865b88d2f4ce3a9b6c4fafe5c78d7/FLAG49c96542e [2024-11-09 22:24:23,190 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaae54dba/331865b88d2f4ce3a9b6c4fafe5c78d7 [2024-11-09 22:24:23,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:24:23,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:24:23,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:24:23,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:24:23,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:24:23,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6029f150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23, skipping insertion in model container [2024-11-09 22:24:23,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:24:23,332 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/loop-simple/deep-nested.c[863,876] [2024-11-09 22:24:23,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:24:23,345 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:24:23,356 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/loop-simple/deep-nested.c[863,876] [2024-11-09 22:24:23,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:24:23,368 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:24:23,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23 WrapperNode [2024-11-09 22:24:23,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:24:23,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:24:23,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:24:23,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:24:23,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,409 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-11-09 22:24:23,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:24:23,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:24:23,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:24:23,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:24:23,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,417 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,424 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 22:24:23,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,426 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,427 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:24:23,428 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:24:23,429 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:24:23,429 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:24:23,429 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (1/1) ... [2024-11-09 22:24:23,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:24:23,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:23,455 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) [2024-11-09 22:24:23,457 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 [2024-11-09 22:24:23,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:24:23,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:24:23,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:24:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:24:23,544 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:24:23,547 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:24:23,687 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-09 22:24:23,691 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:24:23,700 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:24:23,700 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:24:23,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:24:23 BoogieIcfgContainer [2024-11-09 22:24:23,701 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:24:23,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:24:23,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:24:23,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:24:23,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:24:23" (1/3) ... [2024-11-09 22:24:23,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555233ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:24:23, skipping insertion in model container [2024-11-09 22:24:23,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:24:23" (2/3) ... [2024-11-09 22:24:23,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555233ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:24:23, skipping insertion in model container [2024-11-09 22:24:23,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:24:23" (3/3) ... [2024-11-09 22:24:23,706 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2024-11-09 22:24:23,719 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:24:23,719 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:24:23,757 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:24:23,762 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;@248fe655, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:24:23,762 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:24:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 22:24:23,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:23,769 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:23,770 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:23,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -867483110, now seen corresponding path program 1 times [2024-11-09 22:24:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478248835] [2024-11-09 22:24:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:24:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478248835] [2024-11-09 22:24:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478248835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:24,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:24:24,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 22:24:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438233645] [2024-11-09 22:24:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:24,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:24:24,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:24:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 22:24:24,138 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:24,198 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2024-11-09 22:24:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:24:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-09 22:24:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:24,222 INFO L225 Difference]: With dead ends: 50 [2024-11-09 22:24:24,222 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 22:24:24,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:24:24,234 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:24,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 22:24:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-09 22:24:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-09 22:24:24,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2024-11-09 22:24:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:24,274 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-09 22:24:24,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-09 22:24:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 22:24:24,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:24,275 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:24,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:24:24,275 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:24,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1407704565, now seen corresponding path program 1 times [2024-11-09 22:24:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:24,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796619374] [2024-11-09 22:24:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 22:24:24,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:24,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796619374] [2024-11-09 22:24:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796619374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:24,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:24:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 22:24:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511614528] [2024-11-09 22:24:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:24,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 22:24:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 22:24:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 22:24:24,638 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:24,682 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-09 22:24:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 22:24:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-09 22:24:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:24,683 INFO L225 Difference]: With dead ends: 44 [2024-11-09 22:24:24,683 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 22:24:24,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 22:24:24,685 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:24,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 22:24:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-11-09 22:24:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-09 22:24:24,696 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 18 [2024-11-09 22:24:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:24,696 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-09 22:24:24,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-09 22:24:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 22:24:24,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:24,697 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:24,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:24:24,698 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:24,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1743342404, now seen corresponding path program 1 times [2024-11-09 22:24:24,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140196744] [2024-11-09 22:24:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 22:24:24,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140196744] [2024-11-09 22:24:24,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140196744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309673827] [2024-11-09 22:24:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:24,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:24,943 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) [2024-11-09 22:24:24,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 22:24:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:24,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 22:24:24,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 22:24:25,041 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309673827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:25,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 22:24:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433329595] [2024-11-09 22:24:25,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:25,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:24:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:24:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:24:25,043 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:25,111 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2024-11-09 22:24:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:24:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 22:24:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:25,113 INFO L225 Difference]: With dead ends: 95 [2024-11-09 22:24:25,113 INFO L226 Difference]: Without dead ends: 74 [2024-11-09 22:24:25,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 22:24:25,114 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:25,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 33 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-09 22:24:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2024-11-09 22:24:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-09 22:24:25,123 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2024-11-09 22:24:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:25,123 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-09 22:24:25,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-09 22:24:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 22:24:25,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:25,124 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:25,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 22:24:25,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:25,328 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:25,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1390802002, now seen corresponding path program 1 times [2024-11-09 22:24:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:25,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679065580] [2024-11-09 22:24:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:25,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 22:24:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679065580] [2024-11-09 22:24:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679065580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812066435] [2024-11-09 22:24:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:25,498 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) [2024-11-09 22:24:25,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 22:24:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:25,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 22:24:25,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 22:24:25,581 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812066435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:25,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:25,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 22:24:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762821630] [2024-11-09 22:24:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:25,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:24:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:24:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 22:24:25,583 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:25,646 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2024-11-09 22:24:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:24:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 22:24:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:25,648 INFO L225 Difference]: With dead ends: 110 [2024-11-09 22:24:25,648 INFO L226 Difference]: Without dead ends: 72 [2024-11-09 22:24:25,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:24:25,649 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:25,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-09 22:24:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2024-11-09 22:24:25,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-11-09 22:24:25,661 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 28 [2024-11-09 22:24:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:25,661 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-11-09 22:24:25,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-11-09 22:24:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 22:24:25,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:25,662 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:25,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 22:24:25,866 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,SelfDestructingSolverStorable3 [2024-11-09 22:24:25,868 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:25,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2085849375, now seen corresponding path program 1 times [2024-11-09 22:24:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910670860] [2024-11-09 22:24:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 22:24:26,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910670860] [2024-11-09 22:24:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910670860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148151185] [2024-11-09 22:24:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:26,085 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) [2024-11-09 22:24:26,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 22:24:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:26,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 22:24:26,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 22:24:26,179 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:26,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148151185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:26,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:26,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 22:24:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181790352] [2024-11-09 22:24:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:26,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:24:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:24:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-09 22:24:26,180 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:26,242 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2024-11-09 22:24:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 22:24:26,242 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 22:24:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:26,243 INFO L225 Difference]: With dead ends: 112 [2024-11-09 22:24:26,243 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 22:24:26,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:24:26,244 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:26,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 22:24:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2024-11-09 22:24:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-09 22:24:26,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 33 [2024-11-09 22:24:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:26,258 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-09 22:24:26,258 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-09 22:24:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 22:24:26,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:26,259 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:26,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 22:24:26,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:26,466 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:26,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1711955147, now seen corresponding path program 1 times [2024-11-09 22:24:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392404072] [2024-11-09 22:24:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 22:24:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392404072] [2024-11-09 22:24:26,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392404072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660784517] [2024-11-09 22:24:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:26,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:26,685 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) [2024-11-09 22:24:26,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 22:24:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:26,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 22:24:26,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 22:24:26,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:24:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 22:24:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660784517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:24:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:24:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 22:24:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455768658] [2024-11-09 22:24:27,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:24:27,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 22:24:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 22:24:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 22:24:27,081 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:28,008 INFO L93 Difference]: Finished difference Result 267 states and 324 transitions. [2024-11-09 22:24:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 22:24:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-09 22:24:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:28,010 INFO L225 Difference]: With dead ends: 267 [2024-11-09 22:24:28,010 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 22:24:28,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 22:24:28,011 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 402 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:28,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 224 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 22:24:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 22:24:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2024-11-09 22:24:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.150943396226415) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2024-11-09 22:24:28,027 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 42 [2024-11-09 22:24:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:28,027 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2024-11-09 22:24:28,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2024-11-09 22:24:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 22:24:28,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:28,029 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:28,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:24:28,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:28,229 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:28,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:28,230 INFO L85 PathProgramCache]: Analyzing trace with hash 773019735, now seen corresponding path program 2 times [2024-11-09 22:24:28,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:28,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683864365] [2024-11-09 22:24:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:28,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-09 22:24:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683864365] [2024-11-09 22:24:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683864365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622929863] [2024-11-09 22:24:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:24:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:28,478 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) [2024-11-09 22:24:28,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:24:28,510 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 22:24:28,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:28,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 22:24:28,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 22:24:28,618 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:28,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622929863] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:28,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:28,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 22:24:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487492512] [2024-11-09 22:24:28,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:28,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:24:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:24:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:24:28,620 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:28,667 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2024-11-09 22:24:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:24:28,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-09 22:24:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:28,669 INFO L225 Difference]: With dead ends: 109 [2024-11-09 22:24:28,669 INFO L226 Difference]: Without dead ends: 107 [2024-11-09 22:24:28,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:24:28,670 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 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 [2024-11-09 22:24:28,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-09 22:24:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2024-11-09 22:24:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 105 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2024-11-09 22:24:28,689 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 73 [2024-11-09 22:24:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:28,689 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2024-11-09 22:24:28,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2024-11-09 22:24:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 22:24:28,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:28,690 INFO L215 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:28,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 22:24:28,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:28,897 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:28,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -806312513, now seen corresponding path program 3 times [2024-11-09 22:24:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:28,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903337425] [2024-11-09 22:24:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 34 proven. 94 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2024-11-09 22:24:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903337425] [2024-11-09 22:24:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903337425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438144998] [2024-11-09 22:24:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:24:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:29,203 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) [2024-11-09 22:24:29,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:24:29,239 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 22:24:29,240 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:29,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 22:24:29,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2024-11-09 22:24:29,369 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438144998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:29,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:29,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-09 22:24:29,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446475298] [2024-11-09 22:24:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:29,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:24:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:24:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:24:29,370 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:29,404 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2024-11-09 22:24:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:24:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-11-09 22:24:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:29,405 INFO L225 Difference]: With dead ends: 153 [2024-11-09 22:24:29,405 INFO L226 Difference]: Without dead ends: 151 [2024-11-09 22:24:29,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:24:29,406 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 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 [2024-11-09 22:24:29,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-09 22:24:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 116. [2024-11-09 22:24:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 115 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2024-11-09 22:24:29,420 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 96 [2024-11-09 22:24:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:29,420 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2024-11-09 22:24:29,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2024-11-09 22:24:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 22:24:29,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:29,421 INFO L215 NwaCegarLoop]: trace histogram [15, 11, 10, 10, 8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:29,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 22:24:29,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:29,622 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:29,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash 642352282, now seen corresponding path program 4 times [2024-11-09 22:24:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:29,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444895762] [2024-11-09 22:24:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 36 proven. 122 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2024-11-09 22:24:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444895762] [2024-11-09 22:24:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444895762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081677939] [2024-11-09 22:24:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 22:24:29,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:29,918 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) [2024-11-09 22:24:29,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 22:24:29,964 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 22:24:29,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:29,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 22:24:29,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 134 proven. 110 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-09 22:24:30,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:24:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 46 proven. 198 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-09 22:24:30,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081677939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:24:30,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:24:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2024-11-09 22:24:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477943835] [2024-11-09 22:24:30,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:24:30,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 22:24:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 22:24:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-09 22:24:30,489 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:30,709 INFO L93 Difference]: Finished difference Result 312 states and 364 transitions. [2024-11-09 22:24:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 22:24:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-09 22:24:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:30,710 INFO L225 Difference]: With dead ends: 312 [2024-11-09 22:24:30,710 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 22:24:30,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-11-09 22:24:30,714 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:30,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 196 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:24:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 22:24:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2024-11-09 22:24:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.103225806451613) internal successors, (171), 155 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2024-11-09 22:24:30,732 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 109 [2024-11-09 22:24:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:30,732 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2024-11-09 22:24:30,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2024-11-09 22:24:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 22:24:30,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:30,733 INFO L215 NwaCegarLoop]: trace histogram [25, 21, 20, 20, 8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:30,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 22:24:30,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:30,934 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:30,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1542566096, now seen corresponding path program 5 times [2024-11-09 22:24:30,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:30,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319777271] [2024-11-09 22:24:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 36 proven. 380 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2024-11-09 22:24:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319777271] [2024-11-09 22:24:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319777271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110192328] [2024-11-09 22:24:31,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 22:24:31,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:31,357 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) [2024-11-09 22:24:31,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 22:24:31,414 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-09 22:24:31,415 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:31,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 22:24:31,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 488 proven. 36 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2024-11-09 22:24:31,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:24:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 488 proven. 36 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2024-11-09 22:24:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110192328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:24:31,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:24:31,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2024-11-09 22:24:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791259234] [2024-11-09 22:24:31,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:24:31,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 22:24:31,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 22:24:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-09 22:24:31,652 INFO L87 Difference]: Start difference. First operand 156 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:32,351 INFO L93 Difference]: Finished difference Result 572 states and 642 transitions. [2024-11-09 22:24:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 22:24:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-11-09 22:24:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:32,353 INFO L225 Difference]: With dead ends: 572 [2024-11-09 22:24:32,353 INFO L226 Difference]: Without dead ends: 369 [2024-11-09 22:24:32,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 22:24:32,354 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 136 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:32,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 239 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 22:24:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-09 22:24:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 276. [2024-11-09 22:24:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0727272727272728) internal successors, (295), 275 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 295 transitions. [2024-11-09 22:24:32,377 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 295 transitions. Word has length 149 [2024-11-09 22:24:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:32,377 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 295 transitions. [2024-11-09 22:24:32,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 295 transitions. [2024-11-09 22:24:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-09 22:24:32,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:32,379 INFO L215 NwaCegarLoop]: trace histogram [54, 46, 45, 45, 12, 9, 8, 8, 7, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:32,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 22:24:32,583 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,SelfDestructingSolverStorable9 [2024-11-09 22:24:32,584 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:32,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1705348395, now seen corresponding path program 6 times [2024-11-09 22:24:32,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:32,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083714682] [2024-11-09 22:24:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5117 backedges. 44 proven. 1071 refuted. 0 times theorem prover too weak. 4002 trivial. 0 not checked. [2024-11-09 22:24:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083714682] [2024-11-09 22:24:33,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083714682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093144061] [2024-11-09 22:24:33,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 22:24:33,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:33,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:33,300 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) [2024-11-09 22:24:33,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 22:24:33,341 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 22:24:33,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:33,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 22:24:33,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5117 backedges. 2304 proven. 0 refuted. 0 times theorem prover too weak. 2813 trivial. 0 not checked. [2024-11-09 22:24:33,704 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:24:33,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093144061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:24:33,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:24:33,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2024-11-09 22:24:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637369350] [2024-11-09 22:24:33,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:24:33,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:24:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:24:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-09 22:24:33,705 INFO L87 Difference]: Start difference. First operand 276 states and 295 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:33,763 INFO L93 Difference]: Finished difference Result 513 states and 545 transitions. [2024-11-09 22:24:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:24:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2024-11-09 22:24:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:33,766 INFO L225 Difference]: With dead ends: 513 [2024-11-09 22:24:33,766 INFO L226 Difference]: Without dead ends: 511 [2024-11-09 22:24:33,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-09 22:24:33,767 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 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 [2024-11-09 22:24:33,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:24:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-11-09 22:24:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 328. [2024-11-09 22:24:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.070336391437309) internal successors, (350), 327 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 350 transitions. [2024-11-09 22:24:33,794 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 350 transitions. Word has length 269 [2024-11-09 22:24:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:33,794 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 350 transitions. [2024-11-09 22:24:33,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 350 transitions. [2024-11-09 22:24:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-09 22:24:33,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:33,796 INFO L215 NwaCegarLoop]: trace histogram [66, 56, 55, 55, 15, 11, 10, 10, 8, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:33,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 22:24:34,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:34,000 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:34,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1167056092, now seen corresponding path program 7 times [2024-11-09 22:24:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:34,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221008373] [2024-11-09 22:24:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7657 backedges. 52 proven. 1325 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2024-11-09 22:24:34,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221008373] [2024-11-09 22:24:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221008373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:34,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355297274] [2024-11-09 22:24:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 22:24:34,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:34,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:34,753 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) [2024-11-09 22:24:34,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 22:24:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:34,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 22:24:34,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7657 backedges. 2318 proven. 167 refuted. 0 times theorem prover too weak. 5172 trivial. 0 not checked. [2024-11-09 22:24:35,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:24:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7657 backedges. 2318 proven. 167 refuted. 0 times theorem prover too weak. 5172 trivial. 0 not checked. [2024-11-09 22:24:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355297274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:24:35,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:24:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-09 22:24:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083004273] [2024-11-09 22:24:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:24:35,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 22:24:35,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 22:24:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:24:35,340 INFO L87 Difference]: Start difference. First operand 328 states and 350 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:24:50,725 INFO L93 Difference]: Finished difference Result 1515 states and 1700 transitions. [2024-11-09 22:24:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 22:24:50,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2024-11-09 22:24:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:24:50,728 INFO L225 Difference]: With dead ends: 1515 [2024-11-09 22:24:50,729 INFO L226 Difference]: Without dead ends: 1195 [2024-11-09 22:24:50,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1136, Invalid=5670, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 22:24:50,731 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 463 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 22:24:50,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 323 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 22:24:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2024-11-09 22:24:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1106. [2024-11-09 22:24:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.0380090497737557) internal successors, (1147), 1105 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1147 transitions. [2024-11-09 22:24:50,819 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1147 transitions. Word has length 324 [2024-11-09 22:24:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:24:50,819 INFO L471 AbstractCegarLoop]: Abstraction has 1106 states and 1147 transitions. [2024-11-09 22:24:50,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:24:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1147 transitions. [2024-11-09 22:24:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2024-11-09 22:24:50,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:24:50,841 INFO L215 NwaCegarLoop]: trace histogram [255, 226, 225, 225, 34, 30, 29, 29, 8, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 22:24:50,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 22:24:51,041 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,SelfDestructingSolverStorable11 [2024-11-09 22:24:51,042 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:24:51,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:24:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash -402628917, now seen corresponding path program 8 times [2024-11-09 22:24:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:24:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014284844] [2024-11-09 22:24:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:24:51,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:24:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:24:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 117010 backedges. 90 proven. 8253 refuted. 0 times theorem prover too weak. 108667 trivial. 0 not checked. [2024-11-09 22:24:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:24:54,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014284844] [2024-11-09 22:24:54,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014284844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:24:54,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109268031] [2024-11-09 22:24:54,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:24:54,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:24:54,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:24:54,257 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) [2024-11-09 22:24:54,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 22:24:54,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:24:54,492 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:24:54,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 22:24:54,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:24:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 117010 backedges. 28379 proven. 934 refuted. 0 times theorem prover too weak. 87697 trivial. 0 not checked. [2024-11-09 22:24:55,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:24:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 117010 backedges. 27807 proven. 1506 refuted. 0 times theorem prover too weak. 87697 trivial. 0 not checked. [2024-11-09 22:24:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109268031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:24:55,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:24:55,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 47 [2024-11-09 22:24:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644290260] [2024-11-09 22:24:55,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:24:55,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 22:24:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:24:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 22:24:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 22:24:55,958 INFO L87 Difference]: Start difference. First operand 1106 states and 1147 transitions. Second operand has 47 states, 47 states have (on average 4.851063829787234) internal successors, (228), 47 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 22:25:14,983 WARN L286 SmtUtils]: Spent 17.85s on a formula simplification. DAG size of input: 52 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 22:25:30,664 WARN L286 SmtUtils]: Spent 15.13s on a formula simplification. DAG size of input: 51 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 22:25:47,753 WARN L286 SmtUtils]: Spent 16.28s on a formula simplification. DAG size of input: 46 DAG size of output: 34 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 22:26:00,489 WARN L286 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 42 DAG size of output: 33 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)