./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.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 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:04:34,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:04:34,997 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:04:35,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:04:35,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:04:35,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:04:35,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:04:35,030 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:04:35,031 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:04:35,032 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:04:35,032 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:04:35,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:04:35,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:04:35,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:04:35,033 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:04:35,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:04:35,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:04:35,036 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:04:35,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:04:35,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:04:35,036 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:04:35,037 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:04:35,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:04:35,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:04:35,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:04:35,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:04:35,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:04:35,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:04:35,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:04:35,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:04:35,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:04:35,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 125fe310e2ae1e5a109eb21d52d95bf156448ac6c5b2e6793bd0b6f80e48ce1d [2024-10-12 15:04:35,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:04:35,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:04:35,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:04:35,230 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:04:35,230 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:04:35,232 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.c [2024-10-12 15:04:36,410 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:04:36,556 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:04:36,556 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms2.c [2024-10-12 15:04:36,561 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a848e529e/517c83060a9a4ef9ad1be7d4561e4840/FLAGafd3cd0e9 [2024-10-12 15:04:36,571 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a848e529e/517c83060a9a4ef9ad1be7d4561e4840 [2024-10-12 15:04:36,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:04:36,574 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:04:36,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:04:36,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:04:36,578 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:04:36,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,581 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470f0435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36, skipping insertion in model container [2024-10-12 15:04:36,581 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,594 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:04:36,713 WARN L248 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/ms2.c[586,599] [2024-10-12 15:04:36,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:04:36,742 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:04:36,750 WARN L248 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/ms2.c[586,599] [2024-10-12 15:04:36,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:04:36,775 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:04:36,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36 WrapperNode [2024-10-12 15:04:36,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:04:36,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:04:36,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:04:36,777 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:04:36,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,807 INFO L138 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2024-10-12 15:04:36,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:04:36,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:04:36,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:04:36,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:04:36,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,821 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,833 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 6, 2, 4]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2024-10-12 15:04:36,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,834 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:04:36,852 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:04:36,852 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:04:36,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:04:36,853 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (1/1) ... [2024-10-12 15:04:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:04:36,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:04:36,874 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) [2024-10-12 15:04:36,875 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 [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 15:04:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:04:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 15:04:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 15:04:36,976 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:04:36,978 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:04:37,080 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 15:04:37,080 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:04:37,102 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:04:37,102 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 15:04:37,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:04:37 BoogieIcfgContainer [2024-10-12 15:04:37,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:04:37,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:04:37,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:04:37,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:04:37,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:04:36" (1/3) ... [2024-10-12 15:04:37,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452cbc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:04:37, skipping insertion in model container [2024-10-12 15:04:37,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:04:36" (2/3) ... [2024-10-12 15:04:37,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452cbc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:04:37, skipping insertion in model container [2024-10-12 15:04:37,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:04:37" (3/3) ... [2024-10-12 15:04:37,108 INFO L112 eAbstractionObserver]: Analyzing ICFG ms2.c [2024-10-12 15:04:37,120 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:04:37,120 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:04:37,157 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:04:37,162 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;@77956f8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:04:37,162 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:04:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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) [2024-10-12 15:04:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 15:04:37,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:37,169 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:37,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:37,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -475281051, now seen corresponding path program 1 times [2024-10-12 15:04:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:37,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058897596] [2024-10-12 15:04:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058897596] [2024-10-12 15:04:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058897596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:04:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:04:37,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:04:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653325821] [2024-10-12 15:04:37,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:04:37,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:04:37,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:04:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:04:37,322 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-12 15:04:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:37,338 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2024-10-12 15:04:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:04:37,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2024-10-12 15:04:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:37,345 INFO L225 Difference]: With dead ends: 29 [2024-10-12 15:04:37,345 INFO L226 Difference]: Without dead ends: 13 [2024-10-12 15:04:37,347 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 [2024-10-12 15:04:37,349 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:37,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:04:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-12 15:04:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-12 15:04:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2024-10-12 15:04:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-12 15:04:37,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2024-10-12 15:04:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:37,371 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-12 15:04:37,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-10-12 15:04:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-12 15:04:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 15:04:37,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:37,372 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:37,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:04:37,372 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:37,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1284627677, now seen corresponding path program 1 times [2024-10-12 15:04:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:37,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809381139] [2024-10-12 15:04:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:37,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809381139] [2024-10-12 15:04:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809381139] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:04:37,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:04:37,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:04:37,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046557858] [2024-10-12 15:04:37,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:04:37,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:04:37,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:04:37,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:04:37,521 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-12 15:04:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:37,580 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-10-12 15:04:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:04:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-10-12 15:04:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:37,581 INFO L225 Difference]: With dead ends: 25 [2024-10-12 15:04:37,581 INFO L226 Difference]: Without dead ends: 17 [2024-10-12 15:04:37,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:04:37,582 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:37,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:04:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-12 15:04:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-10-12 15:04:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:04:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-12 15:04:37,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-10-12 15:04:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:37,589 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-12 15:04:37,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-12 15:04:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-12 15:04:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 15:04:37,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:37,590 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:37,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:04:37,590 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:37,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -254677122, now seen corresponding path program 1 times [2024-10-12 15:04:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:37,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715546430] [2024-10-12 15:04:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:04:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715546430] [2024-10-12 15:04:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715546430] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:04:37,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:04:37,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 15:04:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126822905] [2024-10-12 15:04:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:04:37,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:04:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:04:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:04:37,789 INFO L87 Difference]: Start difference. First operand 16 states and 18 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) [2024-10-12 15:04:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:37,829 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-12 15:04:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:04:37,830 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 [2024-10-12 15:04:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:37,831 INFO L225 Difference]: With dead ends: 23 [2024-10-12 15:04:37,831 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 15:04:37,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:04:37,833 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:37,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:04:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 15:04:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-10-12 15:04:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:04:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-10-12 15:04:37,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2024-10-12 15:04:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:37,836 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-10-12 15:04:37,837 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) [2024-10-12 15:04:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-10-12 15:04:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 15:04:37,837 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:37,837 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:37,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 15:04:37,837 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:37,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash -577618426, now seen corresponding path program 1 times [2024-10-12 15:04:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:37,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987860278] [2024-10-12 15:04:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:37,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987860278] [2024-10-12 15:04:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987860278] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:04:37,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430230692] [2024-10-12 15:04:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:37,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:04:37,940 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) [2024-10-12 15:04:37,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:04:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:38,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:04:38,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:04:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:38,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:04:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:38,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430230692] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:04:38,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:04:38,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:04:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714276942] [2024-10-12 15:04:38,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:04:38,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:04:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:04:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:04:38,134 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2024-10-12 15:04:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:38,183 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-10-12 15:04:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:04:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 17 [2024-10-12 15:04:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:38,184 INFO L225 Difference]: With dead ends: 35 [2024-10-12 15:04:38,185 INFO L226 Difference]: Without dead ends: 21 [2024-10-12 15:04:38,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:04:38,186 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:38,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:04:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-12 15:04:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-10-12 15:04:38,191 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) [2024-10-12 15:04:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-10-12 15:04:38,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2024-10-12 15:04:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:38,193 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-10-12 15:04:38,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2024-10-12 15:04:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-10-12 15:04:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 15:04:38,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:38,195 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:38,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 15:04:38,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:38,400 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:38,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1060569855, now seen corresponding path program 2 times [2024-10-12 15:04:38,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:38,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783057425] [2024-10-12 15:04:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:38,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783057425] [2024-10-12 15:04:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783057425] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:04:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318462824] [2024-10-12 15:04:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:04:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:04:38,906 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) [2024-10-12 15:04:38,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:04:38,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:04:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:04:38,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 15:04:38,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:04:38,997 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 [2024-10-12 15:04:39,058 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 [2024-10-12 15:04:39,134 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 23 treesize of output 3 [2024-10-12 15:04:39,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 15:04:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:39,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:04:39,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-10-12 15:04:39,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:04:39,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 77 [2024-10-12 15:04:39,392 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:04:39,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2024-10-12 15:04:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:39,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318462824] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:04:39,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:04:39,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2024-10-12 15:04:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644639739] [2024-10-12 15:04:39,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:04:39,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 15:04:39,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 15:04:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-10-12 15:04:39,424 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 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) [2024-10-12 15:04:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:39,591 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-10-12 15:04:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 15:04:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 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) Word has length 18 [2024-10-12 15:04:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:39,592 INFO L225 Difference]: With dead ends: 34 [2024-10-12 15:04:39,592 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 15:04:39,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2024-10-12 15:04:39,593 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:39,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:04:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 15:04:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-10-12 15:04:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:04:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-10-12 15:04:39,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2024-10-12 15:04:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:39,600 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-10-12 15:04:39,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 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) [2024-10-12 15:04:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-10-12 15:04:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 15:04:39,600 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:39,600 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:39,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 15:04:39,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:39,805 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:39,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -60842589, now seen corresponding path program 3 times [2024-10-12 15:04:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:39,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718535335] [2024-10-12 15:04:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:39,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718535335] [2024-10-12 15:04:39,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718535335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:04:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621003146] [2024-10-12 15:04:39,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:04:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:04:39,878 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) [2024-10-12 15:04:39,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:04:39,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 15:04:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:04:39,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:04:39,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:04:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:39,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:04:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:40,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621003146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:04:40,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:04:40,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:04:40,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889067732] [2024-10-12 15:04:40,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:04:40,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:04:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:04:40,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:04:40,034 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2024-10-12 15:04:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:04:40,087 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-10-12 15:04:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:04:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 21 [2024-10-12 15:04:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:04:40,088 INFO L225 Difference]: With dead ends: 45 [2024-10-12 15:04:40,088 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 15:04:40,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:04:40,089 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:04:40,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:04:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 15:04:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-12 15:04:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:04:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-10-12 15:04:40,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2024-10-12 15:04:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:04:40,092 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-10-12 15:04:40,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2024-10-12 15:04:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-10-12 15:04:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:04:40,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:04:40,093 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:04:40,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 15:04:40,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:40,293 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:04:40,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:04:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash -673683682, now seen corresponding path program 4 times [2024-10-12 15:04:40,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:04:40,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766134343] [2024-10-12 15:04:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:04:40,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:04:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:04:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:04:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:04:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766134343] [2024-10-12 15:04:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766134343] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:04:40,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936203304] [2024-10-12 15:04:40,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:04:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:04:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:04:40,877 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) [2024-10-12 15:04:40,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:04:40,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:04:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:04:40,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:04:40,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:04:40,937 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 74 treesize of output 61 [2024-10-12 15:04:40,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 15:04:40,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 16 [2024-10-12 15:04:40,994 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 127 treesize of output 111 [2024-10-12 15:04:40,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 137 [2024-10-12 15:04:41,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:04:41,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 17 [2024-10-12 15:04:41,849 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 [2024-10-12 15:04:44,446 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 23 treesize of output 3 [2024-10-12 15:04:46,537 INFO L349 Elim1Store]: treesize reduction 49, result has 44.9 percent of original size [2024-10-12 15:04:46,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 87 [2024-10-12 15:04:46,543 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 36 treesize of output 13 [2024-10-12 15:04:46,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-12 15:04:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:04:46,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:04:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:04:47,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936203304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:04:47,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:04:47,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2024-10-12 15:04:47,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019491388] [2024-10-12 15:04:47,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:04:47,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-12 15:04:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:04:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-12 15:04:47,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1334, Unknown=2, NotChecked=0, Total=1560 [2024-10-12 15:04:47,272 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2024-10-12 15:04:51,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:04:58,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:02,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:06,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:14,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:18,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:27,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:34,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:38,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:46,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:53,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:05:59,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:06:03,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:06:07,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:06:13,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 15:06:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:06:13,130 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-12 15:06:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 15:06:13,131 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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 [2024-10-12 15:06:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:06:13,131 INFO L225 Difference]: With dead ends: 42 [2024-10-12 15:06:13,131 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 15:06:13,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=472, Invalid=2489, Unknown=9, NotChecked=0, Total=2970 [2024-10-12 15:06:13,132 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 39 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:06:13,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 80 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 374 Invalid, 15 Unknown, 0 Unchecked, 57.1s Time] [2024-10-12 15:06:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 15:06:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-10-12 15:06:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2024-10-12 15:06:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-10-12 15:06:13,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2024-10-12 15:06:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:06:13,139 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-10-12 15:06:13,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2024-10-12 15:06:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-10-12 15:06:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 15:06:13,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:06:13,139 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:06:13,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 15:06:13,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:06:13,340 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:06:13,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:06:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2027085210, now seen corresponding path program 5 times [2024-10-12 15:06:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:06:13,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294628902] [2024-10-12 15:06:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:06:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:06:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:06:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:06:13,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294628902] [2024-10-12 15:06:13,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294628902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:06:13,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767351197] [2024-10-12 15:06:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:06:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:06:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:06:13,456 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) [2024-10-12 15:06:13,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:06:13,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-12 15:06:13,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:06:13,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:06:13,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:06:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:13,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:06:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767351197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:06:13,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:06:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:06:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410480941] [2024-10-12 15:06:13,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:06:13,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:06:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:06:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:06:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:06:13,630 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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) [2024-10-12 15:06:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:06:13,711 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2024-10-12 15:06:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:06:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 25 [2024-10-12 15:06:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:06:13,712 INFO L225 Difference]: With dead ends: 55 [2024-10-12 15:06:13,712 INFO L226 Difference]: Without dead ends: 29 [2024-10-12 15:06:13,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:06:13,713 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:06:13,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:06:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-12 15:06:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-10-12 15:06:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2024-10-12 15:06:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-10-12 15:06:13,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2024-10-12 15:06:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:06:13,718 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-10-12 15:06:13,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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) [2024-10-12 15:06:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-10-12 15:06:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:06:13,718 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:06:13,718 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:06:13,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 15:06:13,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:06:13,919 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:06:13,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:06:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash -35735967, now seen corresponding path program 6 times [2024-10-12 15:06:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:06:13,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346754680] [2024-10-12 15:06:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:06:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:06:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:06:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:14,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:06:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346754680] [2024-10-12 15:06:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346754680] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:06:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579934587] [2024-10-12 15:06:14,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:06:14,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:06:14,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:06:14,722 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) [2024-10-12 15:06:14,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 15:06:14,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-12 15:06:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:06:14,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 15:06:14,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:06:14,851 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 [2024-10-12 15:06:14,877 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 [2024-10-12 15:06:14,914 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 78 treesize of output 62 [2024-10-12 15:06:14,943 INFO L349 Elim1Store]: treesize reduction 74, result has 16.9 percent of original size [2024-10-12 15:06:14,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 88 [2024-10-12 15:06:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:06:14,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 14 [2024-10-12 15:06:15,342 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 [2024-10-12 15:06:15,492 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 23 treesize of output 3 [2024-10-12 15:06:15,675 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 34 treesize of output 11 [2024-10-12 15:06:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:06:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:06:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:06:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:06:20,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:06:20,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 44 [2024-10-12 15:06:20,005 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 36 treesize of output 13 [2024-10-12 15:06:20,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:06:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:20,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:06:20,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-10-12 15:06:20,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:06:20,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 77 [2024-10-12 15:06:20,823 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-12 15:06:20,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1808 treesize of output 1682 [2024-10-12 15:06:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:06:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579934587] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:06:20,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:06:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 20] total 53 [2024-10-12 15:06:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609897865] [2024-10-12 15:06:20,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:06:20,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-12 15:06:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:06:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-12 15:06:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2354, Unknown=1, NotChecked=0, Total=2756 [2024-10-12 15:06:20,934 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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)