./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 c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-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-?-c7c6ca5-m [2024-11-08 10:13:44,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:13:44,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:13:44,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:13:44,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:13:44,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:13:44,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:13:44,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:13:44,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:13:44,765 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:13:44,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:13:44,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:13:44,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:13:44,770 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:13:44,772 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:13:44,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:13:44,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:13:44,773 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:13:44,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:13:44,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:13:44,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:13:44,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:13:44,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:13:44,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:13:44,775 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:13:44,775 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:13:44,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:13:44,776 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:13:44,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:13:44,777 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:13:44,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:13:44,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:13:44,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:13:44,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:13:44,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:13:44,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:13:44,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:13:44,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:13:44,779 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:13:44,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:13:44,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:13:44,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:13:44,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 [2024-11-08 10:13:45,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:13:45,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:13:45,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:13:45,086 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:13:45,087 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:13:45,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5.c [2024-11-08 10:13:46,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:13:46,652 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:13:46,653 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5.c [2024-11-08 10:13:46,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccdcd4e7/01fcea61dd0046d093bd8a4f772272ad/FLAG082b756fd [2024-11-08 10:13:46,681 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ccdcd4e7/01fcea61dd0046d093bd8a4f772272ad [2024-11-08 10:13:46,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:13:46,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:13:46,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:13:46,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:13:46,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:13:46,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:46,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282052d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46, skipping insertion in model container [2024-11-08 10:13:46,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:46,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:13:46,912 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] [2024-11-08 10:13:46,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:13:46,951 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:13:46,965 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] [2024-11-08 10:13:46,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:13:46,994 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:13:46,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46 WrapperNode [2024-11-08 10:13:46,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:13:46,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:13:46,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:13:46,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:13:47,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,032 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-11-08 10:13:47,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:13:47,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:13:47,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:13:47,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:13:47,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,051 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,076 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]. [2024-11-08 10:13:47,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:13:47,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:13:47,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:13:47,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:13:47,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (1/1) ... [2024-11-08 10:13:47,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:13:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:47,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 10:13:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 10:13:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:13:47,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:13:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:13:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:13:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 10:13:47,301 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:13:47,303 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:13:47,520 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 10:13:47,524 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:13:47,538 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:13:47,541 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 10:13:47,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:13:47 BoogieIcfgContainer [2024-11-08 10:13:47,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:13:47,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:13:47,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:13:47,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:13:47,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:13:46" (1/3) ... [2024-11-08 10:13:47,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3307ae48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:13:47, skipping insertion in model container [2024-11-08 10:13:47,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:13:46" (2/3) ... [2024-11-08 10:13:47,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3307ae48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:13:47, skipping insertion in model container [2024-11-08 10:13:47,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:13:47" (3/3) ... [2024-11-08 10:13:47,551 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn5.c [2024-11-08 10:13:47,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:13:47,568 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:13:47,631 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:13:47,637 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;@3cb08b60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:13:47,637 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:13:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:13:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 10:13:47,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:47,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:47,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:47,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2024-11-08 10:13:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:47,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522932073] [2024-11-08 10:13:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:47,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:47,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522932073] [2024-11-08 10:13:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522932073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:13:47,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:13:47,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:13:47,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65019890] [2024-11-08 10:13:47,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:13:47,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:13:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:47,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:13:47,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:13:47,926 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-08 10:13:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:47,941 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-08 10:13:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:13:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-08 10:13:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:47,950 INFO L225 Difference]: With dead ends: 38 [2024-11-08 10:13:47,950 INFO L226 Difference]: Without dead ends: 17 [2024-11-08 10:13:47,954 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 [2024-11-08 10:13:47,957 INFO L432 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:47,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:13:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-08 10:13:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-08 10:13:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2024-11-08 10:13:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-08 10:13:47,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-08 10:13:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:47,993 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-08 10:13:47,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-08 10:13:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-08 10:13:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 10:13:47,996 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:47,996 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:47,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:13:47,996 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:47,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2024-11-08 10:13:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:47,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208258135] [2024-11-08 10:13:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:13:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681409672] [2024-11-08 10:13:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:48,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:48,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:13:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:48,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 10:13:48,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:48,246 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 [2024-11-08 10:13:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:48,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 10:13:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208258135] [2024-11-08 10:13:48,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:13:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681409672] [2024-11-08 10:13:48,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681409672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:13:48,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:13:48,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:13:48,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246275789] [2024-11-08 10:13:48,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:13:48,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:13:48,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:13:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:13:48,346 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 10:13:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:48,424 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-08 10:13:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:13:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-08 10:13:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:48,425 INFO L225 Difference]: With dead ends: 31 [2024-11-08 10:13:48,426 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:13:48,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 10:13:48,427 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:48,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:13:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2024-11-08 10:13:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2024-11-08 10:13:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-08 10:13:48,436 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2024-11-08 10:13:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:48,436 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-08 10:13:48,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-08 10:13:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-08 10:13:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 10:13:48,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:48,437 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:48,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 10:13:48,638 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 [2024-11-08 10:13:48,640 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:48,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2024-11-08 10:13:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:48,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640825590] [2024-11-08 10:13:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:48,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:48,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640825590] [2024-11-08 10:13:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640825590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:13:48,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:13:48,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:13:48,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881926713] [2024-11-08 10:13:48,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:13:48,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:13:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:13:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:13:48,835 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2024-11-08 10:13:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:48,902 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-08 10:13:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:13:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2024-11-08 10:13:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:48,904 INFO L225 Difference]: With dead ends: 41 [2024-11-08 10:13:48,904 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 10:13:48,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:13:48,906 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:48,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 10:13:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-08 10:13:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2024-11-08 10:13:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-08 10:13:48,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2024-11-08 10:13:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:48,911 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-08 10:13:48,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2024-11-08 10:13:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-08 10:13:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:13:48,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:48,912 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:48,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:13:48,913 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:48,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2024-11-08 10:13:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017640852] [2024-11-08 10:13:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:49,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017640852] [2024-11-08 10:13:49,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017640852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:13:49,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272649616] [2024-11-08 10:13:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:49,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:49,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:13:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:49,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 10:13:49,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:49,200 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 10:13:49,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272649616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:13:49,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:13:49,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-11-08 10:13:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436336506] [2024-11-08 10:13:49,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:13:49,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 10:13:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 10:13:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-08 10:13:49,205 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2024-11-08 10:13:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:49,285 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-11-08 10:13:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:13:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 [2024-11-08 10:13:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:49,286 INFO L225 Difference]: With dead ends: 41 [2024-11-08 10:13:49,286 INFO L226 Difference]: Without dead ends: 27 [2024-11-08 10:13:49,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:13:49,287 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:49,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-08 10:13:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2024-11-08 10:13:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:13:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-08 10:13:49,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2024-11-08 10:13:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:49,291 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-08 10:13:49,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2024-11-08 10:13:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-08 10:13:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:13:49,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:49,292 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:49,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:13:49,495 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 [2024-11-08 10:13:49,496 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:49,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2024-11-08 10:13:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:49,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63431752] [2024-11-08 10:13:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:13:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983012792] [2024-11-08 10:13:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:49,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:49,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:49,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:13:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:49,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 10:13:49,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:49,680 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 [2024-11-08 10:13:49,724 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 23 treesize of output 11 [2024-11-08 10:13:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:13:49,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:13:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63431752] [2024-11-08 10:13:49,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:13:49,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983012792] [2024-11-08 10:13:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983012792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:49,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:13:49,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-08 10:13:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421760344] [2024-11-08 10:13:49,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:49,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 10:13:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 10:13:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-08 10:13:49,992 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2024-11-08 10:13:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:50,143 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2024-11-08 10:13:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:13:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) Word has length 16 [2024-11-08 10:13:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:50,144 INFO L225 Difference]: With dead ends: 51 [2024-11-08 10:13:50,145 INFO L226 Difference]: Without dead ends: 49 [2024-11-08 10:13:50,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:13:50,146 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:50,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-08 10:13:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2024-11-08 10:13:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-08 10:13:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-08 10:13:50,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2024-11-08 10:13:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:50,153 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-08 10:13:50,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2024-11-08 10:13:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-08 10:13:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:13:50,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:50,156 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:50,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 10:13:50,357 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 [2024-11-08 10:13:50,357 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:50,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2024-11-08 10:13:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600478208] [2024-11-08 10:13:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:13:50,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932131428] [2024-11-08 10:13:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:50,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:50,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:50,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:50,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:13:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:50,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 10:13:50,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:50,575 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 [2024-11-08 10:13:50,585 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 [2024-11-08 10:13:50,625 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 23 treesize of output 11 [2024-11-08 10:13:50,700 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 [2024-11-08 10:13:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:50,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:51,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600478208] [2024-11-08 10:13:51,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:13:51,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932131428] [2024-11-08 10:13:51,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932131428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:51,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:13:51,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-08 10:13:51,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780856828] [2024-11-08 10:13:51,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:51,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:13:51,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:13:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:13:51,428 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:13:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:52,223 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-11-08 10:13:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 10:13:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 10:13:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:52,224 INFO L225 Difference]: With dead ends: 78 [2024-11-08 10:13:52,224 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 10:13:52,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:13:52,225 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:52,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 128 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:13:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 10:13:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2024-11-08 10:13:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2024-11-08 10:13:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-08 10:13:52,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2024-11-08 10:13:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:52,239 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-08 10:13:52,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:13:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-08 10:13:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:13:52,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:52,241 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:52,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 10:13:52,441 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 [2024-11-08 10:13:52,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:52,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2024-11-08 10:13:52,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:52,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113712033] [2024-11-08 10:13:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:52,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:52,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113712033] [2024-11-08 10:13:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113712033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:13:52,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79878029] [2024-11-08 10:13:52,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:13:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:52,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:52,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:13:52,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:13:52,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:13:52,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:13:52,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:13:52,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:13:52,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79878029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:52,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:13:52,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-11-08 10:13:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919174666] [2024-11-08 10:13:52,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:52,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 10:13:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 10:13:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:13:52,739 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2024-11-08 10:13:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:52,834 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2024-11-08 10:13:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:13:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 [2024-11-08 10:13:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:52,839 INFO L225 Difference]: With dead ends: 102 [2024-11-08 10:13:52,840 INFO L226 Difference]: Without dead ends: 79 [2024-11-08 10:13:52,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:13:52,841 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:52,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 54 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-08 10:13:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2024-11-08 10:13:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:13:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-08 10:13:52,855 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2024-11-08 10:13:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:52,855 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-08 10:13:52,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2024-11-08 10:13:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-08 10:13:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 10:13:52,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:52,856 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:52,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 10:13:53,057 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 [2024-11-08 10:13:53,057 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:53,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2024-11-08 10:13:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:53,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147109035] [2024-11-08 10:13:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:53,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147109035] [2024-11-08 10:13:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147109035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:13:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863941634] [2024-11-08 10:13:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:13:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:53,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:53,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:13:53,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 10:13:53,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:13:53,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:13:53,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:53,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:13:53,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863941634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:53,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:13:53,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:13:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043847424] [2024-11-08 10:13:53,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:53,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:13:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:13:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:13:53,479 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2024-11-08 10:13:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:53,641 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2024-11-08 10:13:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:13:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) Word has length 22 [2024-11-08 10:13:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:53,643 INFO L225 Difference]: With dead ends: 94 [2024-11-08 10:13:53,643 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 10:13:53,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-08 10:13:53,644 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:53,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 74 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 10:13:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2024-11-08 10:13:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 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) [2024-11-08 10:13:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-11-08 10:13:53,658 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 22 [2024-11-08 10:13:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:53,661 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-11-08 10:13:53,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2024-11-08 10:13:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-11-08 10:13:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:13:53,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:53,663 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:53,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 10:13:53,863 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 [2024-11-08 10:13:53,864 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:53,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2024-11-08 10:13:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:53,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429857834] [2024-11-08 10:13:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:53,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:13:53,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:53,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429857834] [2024-11-08 10:13:53,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429857834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:13:53,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307683293] [2024-11-08 10:13:53,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:13:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:53,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:53,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:13:54,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:13:54,051 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:13:54,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 10:13:54,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:13:54,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:13:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307683293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:54,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:13:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-08 10:13:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006236470] [2024-11-08 10:13:54,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:54,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 10:13:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 10:13:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-08 10:13:54,168 INFO L87 Difference]: Start difference. First operand 43 states and 50 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) [2024-11-08 10:13:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:54,261 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2024-11-08 10:13:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 10:13:54,261 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 24 [2024-11-08 10:13:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:54,262 INFO L225 Difference]: With dead ends: 84 [2024-11-08 10:13:54,262 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 10:13:54,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:13:54,263 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:54,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 10:13:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2024-11-08 10:13:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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) [2024-11-08 10:13:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-08 10:13:54,272 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2024-11-08 10:13:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:54,272 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-08 10:13:54,272 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) [2024-11-08 10:13:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-08 10:13:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:13:54,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:54,274 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:54,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 10:13:54,474 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 [2024-11-08 10:13:54,475 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:54,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 3 times [2024-11-08 10:13:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145600640] [2024-11-08 10:13:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:13:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:13:54,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:13:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145600640] [2024-11-08 10:13:54,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145600640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:13:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397237112] [2024-11-08 10:13:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:13:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:54,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:54,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:13:54,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 10:13:54,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:13:54,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:13:54,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:13:54,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:13:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:13:54,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397237112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:13:54,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:13:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-08 10:13:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277657952] [2024-11-08 10:13:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:13:54,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 10:13:54,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:13:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 10:13:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-08 10:13:54,879 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2024-11-08 10:13:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:13:55,122 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-11-08 10:13:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 10:13:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 [2024-11-08 10:13:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:13:55,123 INFO L225 Difference]: With dead ends: 77 [2024-11-08 10:13:55,123 INFO L226 Difference]: Without dead ends: 61 [2024-11-08 10:13:55,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:13:55,124 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:13:55,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 80 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:13:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-08 10:13:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2024-11-08 10:13:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2024-11-08 10:13:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-11-08 10:13:55,133 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2024-11-08 10:13:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:13:55,133 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-11-08 10:13:55,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2024-11-08 10:13:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-11-08 10:13:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:13:55,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:13:55,135 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:13:55,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 10:13:55,336 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 [2024-11-08 10:13:55,336 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:13:55,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:13:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2024-11-08 10:13:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:13:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045910758] [2024-11-08 10:13:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:13:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:13:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:13:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002646322] [2024-11-08 10:13:55,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:13:55,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:13:55,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:13:55,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:13:55,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:13:55,685 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:13:55,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:13:55,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 10:13:55,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:13:55,695 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 [2024-11-08 10:13:55,728 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 [2024-11-08 10:13:55,750 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 [2024-11-08 10:13:55,770 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 [2024-11-08 10:13:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:13:55,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:14:12,304 WARN L286 SmtUtils]: Spent 16.02s 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) [2024-11-08 10:14:52,759 WARN L286 SmtUtils]: Spent 28.24s on a formula simplification. DAG size of input: 75 DAG size of output: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 10:14:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:14:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045910758] [2024-11-08 10:14:52,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:14:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002646322] [2024-11-08 10:14:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002646322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:14:52,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:14:52,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2024-11-08 10:14:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594166991] [2024-11-08 10:14:52,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:14:52,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 10:14:52,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:14:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 10:14:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:14:52,782 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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) [2024-11-08 10:14:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:14:53,394 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-08 10:14:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 10:14:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 [2024-11-08 10:14:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:14:53,396 INFO L225 Difference]: With dead ends: 104 [2024-11-08 10:14:53,396 INFO L226 Difference]: Without dead ends: 102 [2024-11-08 10:14:53,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:14:53,397 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 10:14:53,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 101 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 10:14:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-08 10:14:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 49. [2024-11-08 10:14:53,409 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) [2024-11-08 10:14:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-08 10:14:53,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2024-11-08 10:14:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:14:53,410 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-08 10:14:53,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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) [2024-11-08 10:14:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-08 10:14:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 10:14:53,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:53,411 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:53,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 10:14:53,611 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 [2024-11-08 10:14:53,612 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:53,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 4 times [2024-11-08 10:14:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883928430] [2024-11-08 10:14:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:14:53,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263606761] [2024-11-08 10:14:53,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:14:53,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:14:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:14:53,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:14:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:14:53,851 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:14:53,851 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:14:53,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 10:14:53,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:14:53,866 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 [2024-11-08 10:14:53,871 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 [2024-11-08 10:14:53,907 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 [2024-11-08 10:14:54,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:14:54,007 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 30 treesize of output 21 [2024-11-08 10:14:54,083 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 [2024-11-08 10:14:54,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:14:54,170 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 [2024-11-08 10:14:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:14:54,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:15:08,077 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)