./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn5.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 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:52:03,332 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:52:03,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:52:03,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:52:03,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:52:03,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:52:03,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:52:03,427 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:52:03,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:52:03,429 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:52:03,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:52:03,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:52:03,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:52:03,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:52:03,432 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:52:03,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:52:03,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:52:03,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:52:03,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:52:03,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:52:03,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:52:03,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:52:03,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:52:03,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:52:03,437 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:52:03,438 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:52:03,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:52:03,438 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:52:03,438 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:52:03,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:52:03,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:52:03,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:52:03,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:52:03,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:52:03,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:52:03,439 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:52:03,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:52:03,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:52:03,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:52:03,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:52:03,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:52:03,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:52:03,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 [2024-11-16 02:52:03,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:52:03,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:52:03,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:52:03,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:52:03,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:52:03,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2024-11-16 02:52:05,068 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:52:05,230 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:52:05,230 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2024-11-16 02:52:05,238 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04591bacf/9df3ada6e61947e6a39155c8829296f4/FLAG01bf0b598 [2024-11-16 02:52:05,251 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04591bacf/9df3ada6e61947e6a39155c8829296f4 [2024-11-16 02:52:05,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:52:05,255 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:52:05,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:52:05,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:52:05,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:52:05,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd6703a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05, skipping insertion in model container [2024-11-16 02:52:05,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,278 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:52:05,443 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2024-11-16 02:52:05,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:52:05,485 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:52:05,508 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2024-11-16 02:52:05,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:52:05,534 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:52:05,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05 WrapperNode [2024-11-16 02:52:05,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:52:05,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:52:05,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:52:05,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:52:05,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,569 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-11-16 02:52:05,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:52:05,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:52:05,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:52:05,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:52:05,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,586 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,602 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 7, 4, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-11-16 02:52:05,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,606 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,617 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:52:05,618 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:52:05,622 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:52:05,622 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:52:05,623 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (1/1) ... [2024-11-16 02:52:05,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:52:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:05,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:52:05,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:52:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:52:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:52:05,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:52:05,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:52:05,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:52:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:52:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:52:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:52:05,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 02:52:05,748 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:52:05,749 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:52:05,886 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 02:52:05,886 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:52:05,894 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:52:05,894 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:52:05,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:52:05 BoogieIcfgContainer [2024-11-16 02:52:05,895 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:52:05,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:52:05,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:52:05,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:52:05,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:52:05" (1/3) ... [2024-11-16 02:52:05,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404db273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:52:05, skipping insertion in model container [2024-11-16 02:52:05,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:52:05" (2/3) ... [2024-11-16 02:52:05,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404db273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:52:05, skipping insertion in model container [2024-11-16 02:52:05,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:52:05" (3/3) ... [2024-11-16 02:52:05,901 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn5.c [2024-11-16 02:52:05,915 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:52:05,915 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:52:05,955 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:52:05,960 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;@4fee87e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:52:05,960 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:52:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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) [2024-11-16 02:52:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-16 02:52:05,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:05,967 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:05,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:05,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1288971921, now seen corresponding path program 1 times [2024-11-16 02:52:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719589547] [2024-11-16 02:52:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:06,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:06,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719589547] [2024-11-16 02:52:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719589547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:52:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:52:06,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:52:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122251447] [2024-11-16 02:52:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:52:06,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:52:06,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:52:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:52:06,175 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2024-11-16 02:52:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:06,185 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-11-16 02:52:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:52:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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 [2024-11-16 02:52:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:06,192 INFO L225 Difference]: With dead ends: 41 [2024-11-16 02:52:06,192 INFO L226 Difference]: Without dead ends: 18 [2024-11-16 02:52:06,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:52:06,196 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:06,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:52:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-16 02:52:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-16 02:52:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2024-11-16 02:52:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-16 02:52:06,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2024-11-16 02:52:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:06,217 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-16 02:52:06,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2024-11-16 02:52:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-16 02:52:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 02:52:06,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:06,218 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:06,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:52:06,218 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:06,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 818678700, now seen corresponding path program 1 times [2024-11-16 02:52:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:06,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386280176] [2024-11-16 02:52:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:52:06,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703472248] [2024-11-16 02:52:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:06,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:06,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:52:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:06,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 02:52:06,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:06,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:52:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:06,426 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:52:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386280176] [2024-11-16 02:52:06,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:52:06,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703472248] [2024-11-16 02:52:06,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703472248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:52:06,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:52:06,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:52:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279783700] [2024-11-16 02:52:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:52:06,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:52:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:52:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:52:06,429 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2024-11-16 02:52:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:06,471 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-16 02:52:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:52:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 16 [2024-11-16 02:52:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:06,472 INFO L225 Difference]: With dead ends: 35 [2024-11-16 02:52:06,472 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 02:52:06,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:52:06,473 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:06,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 55 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:52:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 02:52:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-16 02:52:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2024-11-16 02:52:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-16 02:52:06,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-11-16 02:52:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:06,479 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-16 02:52:06,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2024-11-16 02:52:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-16 02:52:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-16 02:52:06,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:06,480 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:06,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:52:06,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:06,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:06,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash 922047883, now seen corresponding path program 1 times [2024-11-16 02:52:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:06,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437183356] [2024-11-16 02:52:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:06,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:06,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437183356] [2024-11-16 02:52:06,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437183356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:52:06,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:52:06,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:52:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393166175] [2024-11-16 02:52:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:52:06,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:52:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:52:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:52:06,807 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-16 02:52:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:06,846 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-11-16 02:52:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:52:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 [2024-11-16 02:52:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:06,848 INFO L225 Difference]: With dead ends: 46 [2024-11-16 02:52:06,848 INFO L226 Difference]: Without dead ends: 36 [2024-11-16 02:52:06,850 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 [2024-11-16 02:52:06,850 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:06,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:52:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-16 02:52:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2024-11-16 02:52:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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) [2024-11-16 02:52:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-16 02:52:06,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-11-16 02:52:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:06,872 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-16 02:52:06,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-16 02:52:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-16 02:52:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 02:52:06,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:06,873 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:06,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 02:52:06,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:06,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1110445517, now seen corresponding path program 1 times [2024-11-16 02:52:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975205228] [2024-11-16 02:52:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:06,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975205228] [2024-11-16 02:52:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975205228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721137591] [2024-11-16 02:52:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:06,976 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) [2024-11-16 02:52:06,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:52:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:07,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 02:52:07,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:07,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:52:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721137591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:52:07,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:52:07,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-11-16 02:52:07,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233466657] [2024-11-16 02:52:07,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:52:07,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:52:07,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:52:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:52:07,090 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2024-11-16 02:52:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:07,164 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2024-11-16 02:52:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:52:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2024-11-16 02:52:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:07,167 INFO L225 Difference]: With dead ends: 46 [2024-11-16 02:52:07,167 INFO L226 Difference]: Without dead ends: 29 [2024-11-16 02:52:07,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:52:07,168 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:07,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-16 02:52:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2024-11-16 02:52:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-11-16 02:52:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-16 02:52:07,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2024-11-16 02:52:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:07,175 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-16 02:52:07,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2024-11-16 02:52:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-16 02:52:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-16 02:52:07,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:07,176 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:07,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:52:07,376 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 [2024-11-16 02:52:07,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:07,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1582103252, now seen corresponding path program 1 times [2024-11-16 02:52:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:07,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110970107] [2024-11-16 02:52:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:07,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:52:07,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592650879] [2024-11-16 02:52:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:07,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:07,432 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) [2024-11-16 02:52:07,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:52:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:07,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 02:52:07,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:07,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:52:07,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 02:52:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:07,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110970107] [2024-11-16 02:52:07,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:52:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592650879] [2024-11-16 02:52:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592650879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:07,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:52:07,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-16 02:52:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847229640] [2024-11-16 02:52:07,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:07,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 02:52:07,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 02:52:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-16 02:52:07,788 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2024-11-16 02:52:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:07,888 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-11-16 02:52:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:52:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 20 [2024-11-16 02:52:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:07,889 INFO L225 Difference]: With dead ends: 57 [2024-11-16 02:52:07,889 INFO L226 Difference]: Without dead ends: 54 [2024-11-16 02:52:07,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:52:07,890 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:07,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 80 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-16 02:52:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2024-11-16 02:52:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2024-11-16 02:52:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-16 02:52:07,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2024-11-16 02:52:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:07,895 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-16 02:52:07,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2024-11-16 02:52:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-16 02:52:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 02:52:07,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:07,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:07,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:08,100 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 [2024-11-16 02:52:08,101 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:08,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:08,102 INFO L85 PathProgramCache]: Analyzing trace with hash 127806387, now seen corresponding path program 1 times [2024-11-16 02:52:08,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:08,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501349667] [2024-11-16 02:52:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:08,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:52:08,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082311455] [2024-11-16 02:52:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:08,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:08,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:08,146 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) [2024-11-16 02:52:08,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:52:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:08,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 02:52:08,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:08,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:52:08,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:52:08,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:52:08,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:52:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:08,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:08,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:08,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501349667] [2024-11-16 02:52:08,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:52:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082311455] [2024-11-16 02:52:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082311455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:08,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:52:08,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-16 02:52:08,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199185098] [2024-11-16 02:52:08,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:08,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 02:52:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 02:52:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:52:08,938 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2024-11-16 02:52:13,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 02:52:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:13,612 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2024-11-16 02:52:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:52:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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 24 [2024-11-16 02:52:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:13,617 INFO L225 Difference]: With dead ends: 83 [2024-11-16 02:52:13,617 INFO L226 Difference]: Without dead ends: 80 [2024-11-16 02:52:13,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-16 02:52:13,618 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:13,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 165 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-11-16 02:52:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-16 02:52:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2024-11-16 02:52:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 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) [2024-11-16 02:52:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-11-16 02:52:13,634 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 24 [2024-11-16 02:52:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:13,634 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-11-16 02:52:13,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2024-11-16 02:52:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-11-16 02:52:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 02:52:13,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:13,636 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:13,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:13,839 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 [2024-11-16 02:52:13,840 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:13,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:13,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1581130454, now seen corresponding path program 2 times [2024-11-16 02:52:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324970240] [2024-11-16 02:52:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:13,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324970240] [2024-11-16 02:52:14,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324970240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222786644] [2024-11-16 02:52:14,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:52:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:14,093 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) [2024-11-16 02:52:14,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:52:14,153 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:52:14,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:14,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:52:14,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:14,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:14,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222786644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:14,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:14,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-16 02:52:14,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309766093] [2024-11-16 02:52:14,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:14,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 02:52:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 02:52:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:52:14,236 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2024-11-16 02:52:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:14,346 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2024-11-16 02:52:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:52:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 24 [2024-11-16 02:52:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:14,347 INFO L225 Difference]: With dead ends: 106 [2024-11-16 02:52:14,347 INFO L226 Difference]: Without dead ends: 86 [2024-11-16 02:52:14,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:52:14,348 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:14,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-16 02:52:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2024-11-16 02:52:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2024-11-16 02:52:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-16 02:52:14,355 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 24 [2024-11-16 02:52:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:14,355 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-16 02:52:14,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2024-11-16 02:52:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-16 02:52:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-16 02:52:14,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:14,356 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:14,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:52:14,560 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 [2024-11-16 02:52:14,561 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:14,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -234123253, now seen corresponding path program 3 times [2024-11-16 02:52:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:14,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578164964] [2024-11-16 02:52:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:14,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578164964] [2024-11-16 02:52:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578164964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092381922] [2024-11-16 02:52:14,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:52:14,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:14,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:14,680 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) [2024-11-16 02:52:14,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:52:14,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:52:14,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:14,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:52:14,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:14,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:14,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092381922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:14,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:14,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-16 02:52:14,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152574387] [2024-11-16 02:52:14,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:14,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:52:14,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:52:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:52:14,950 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2024-11-16 02:52:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:15,078 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2024-11-16 02:52:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 02:52:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 26 [2024-11-16 02:52:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:15,079 INFO L225 Difference]: With dead ends: 95 [2024-11-16 02:52:15,082 INFO L226 Difference]: Without dead ends: 85 [2024-11-16 02:52:15,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:52:15,082 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:15,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 102 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-16 02:52:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 49. [2024-11-16 02:52:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 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) [2024-11-16 02:52:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-16 02:52:15,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 26 [2024-11-16 02:52:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:15,110 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-16 02:52:15,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2024-11-16 02:52:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-16 02:52:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:52:15,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:15,111 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:15,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:15,311 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 [2024-11-16 02:52:15,312 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:15,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1628129606, now seen corresponding path program 2 times [2024-11-16 02:52:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:15,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777935687] [2024-11-16 02:52:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777935687] [2024-11-16 02:52:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777935687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053310012] [2024-11-16 02:52:15,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:52:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:15,423 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) [2024-11-16 02:52:15,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:52:15,488 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:52:15,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:15,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 02:52:15,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:15,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:52:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053310012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:15,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:15,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-16 02:52:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599475109] [2024-11-16 02:52:15,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:15,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:52:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:52:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:52:15,614 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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) [2024-11-16 02:52:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:15,693 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2024-11-16 02:52:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 02:52:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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 [2024-11-16 02:52:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:15,695 INFO L225 Difference]: With dead ends: 97 [2024-11-16 02:52:15,695 INFO L226 Difference]: Without dead ends: 74 [2024-11-16 02:52:15,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:52:15,695 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:15,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 80 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-16 02:52:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2024-11-16 02:52:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 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) [2024-11-16 02:52:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-16 02:52:15,702 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 28 [2024-11-16 02:52:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:15,703 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-16 02:52:15,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 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) [2024-11-16 02:52:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-16 02:52:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:52:15,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:15,704 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:15,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:15,904 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 [2024-11-16 02:52:15,905 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:15,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:15,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1131389643, now seen corresponding path program 3 times [2024-11-16 02:52:15,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:15,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209103968] [2024-11-16 02:52:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:15,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 02:52:15,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:15,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209103968] [2024-11-16 02:52:15,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209103968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256771836] [2024-11-16 02:52:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:52:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:15,997 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) [2024-11-16 02:52:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:52:16,147 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:52:16,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:16,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:52:16,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:52:16,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 02:52:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256771836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:16,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:16,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-16 02:52:16,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063614638] [2024-11-16 02:52:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:16,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 02:52:16,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 02:52:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:52:16,261 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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) [2024-11-16 02:52:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:16,484 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-11-16 02:52:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:52:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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 [2024-11-16 02:52:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:16,485 INFO L225 Difference]: With dead ends: 88 [2024-11-16 02:52:16,485 INFO L226 Difference]: Without dead ends: 69 [2024-11-16 02:52:16,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:52:16,486 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:16,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 108 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:52:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-16 02:52:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2024-11-16 02:52:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 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) [2024-11-16 02:52:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-11-16 02:52:16,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2024-11-16 02:52:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:16,494 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-11-16 02:52:16,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 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) [2024-11-16 02:52:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-11-16 02:52:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-16 02:52:16,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:16,495 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:16,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:52:16,699 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 [2024-11-16 02:52:16,700 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:16,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1454640812, now seen corresponding path program 4 times [2024-11-16 02:52:16,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:16,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763669926] [2024-11-16 02:52:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:16,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:52:16,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891322785] [2024-11-16 02:52:16,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:52:16,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:16,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:16,764 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) [2024-11-16 02:52:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:52:17,040 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:52:17,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:17,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-16 02:52:17,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:17,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:52:17,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 02:52:17,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 02:52:17,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 02:52:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:52:17,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:49,717 WARN L286 SmtUtils]: Spent 16.05s on a formula simplification. DAG size of input: 16 DAG size of output: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:53:14,009 WARN L286 SmtUtils]: Spent 24.22s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 02:53:22,168 WARN L286 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:53:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:53:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:53:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763669926] [2024-11-16 02:53:26,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:53:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891322785] [2024-11-16 02:53:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891322785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:53:26,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:53:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2024-11-16 02:53:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174923393] [2024-11-16 02:53:26,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:53:26,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 02:53:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:53:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 02:53:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:53:26,311 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2024-11-16 02:53:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:53:26,753 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-11-16 02:53:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:53:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 [2024-11-16 02:53:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:53:26,755 INFO L225 Difference]: With dead ends: 116 [2024-11-16 02:53:26,756 INFO L226 Difference]: Without dead ends: 113 [2024-11-16 02:53:26,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-16 02:53:26,756 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:53:26,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:53:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-16 02:53:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2024-11-16 02:53:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2024-11-16 02:53:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-16 02:53:26,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 28 [2024-11-16 02:53:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:53:26,766 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-16 02:53:26,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2024-11-16 02:53:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-16 02:53:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 02:53:26,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:53:26,766 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:53:26,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 02:53:26,970 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 [2024-11-16 02:53:26,971 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:53:26,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:53:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -251684934, now seen corresponding path program 4 times [2024-11-16 02:53:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:53:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24765753] [2024-11-16 02:53:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:53:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:53:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:53:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900255342] [2024-11-16 02:53:27,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:53:27,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:53:27,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:53:27,046 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) [2024-11-16 02:53:27,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:53:27,190 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:53:27,190 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:53:27,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 02:53:27,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:53:27,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:53:27,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:53:27,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:53:27,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:53:27,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-16 02:53:27,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:53:27,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:53:27,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-16 02:53:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:53:27,722 INFO L311 TraceCheckSpWp]: Computing backward predicates...