./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/pcomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/pcomp.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 1472da9c0a8f011e4f758f37d66a1227b497d4a96142a431b3f2f304a275b1b7 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:55:03,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:55:03,849 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:55:03,855 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:55:03,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:55:03,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:55:03,884 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:55:03,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:55:03,885 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:55:03,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:55:03,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:55:03,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:55:03,888 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:55:03,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:55:03,891 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:55:03,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:55:03,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:55:03,891 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:55:03,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:55:03,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:55:03,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:55:03,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:55:03,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:55:03,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:55:03,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:55:03,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:55:03,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:55:03,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:55:03,897 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:55:03,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:55:03,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:55:03,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:55:03,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:55:03,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:55:03,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:55:03,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:55:03,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:55:03,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:55:03,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:55:03,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:55:03,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:55:03,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:55:03,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1472da9c0a8f011e4f758f37d66a1227b497d4a96142a431b3f2f304a275b1b7 [2024-11-16 02:55:04,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:55:04,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:55:04,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:55:04,176 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:55:04,177 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:55:04,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/pcomp.c [2024-11-16 02:55:05,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:55:05,825 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:55:05,825 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcomp.c [2024-11-16 02:55:05,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfab0e572/78b34166b5094892953091102e4c7d68/FLAG2523d075f [2024-11-16 02:55:06,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfab0e572/78b34166b5094892953091102e4c7d68 [2024-11-16 02:55:06,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:55:06,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:55:06,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:55:06,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:55:06,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:55:06,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31733297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06, skipping insertion in model container [2024-11-16 02:55:06,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:55:06,416 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcomp.c[588,601] [2024-11-16 02:55:06,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:55:06,449 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:55:06,461 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcomp.c[588,601] [2024-11-16 02:55:06,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:55:06,483 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:55:06,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06 WrapperNode [2024-11-16 02:55:06,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:55:06,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:55:06,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:55:06,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:55:06,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,523 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2024-11-16 02:55:06,523 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:55:06,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:55:06,524 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:55:06,524 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:55:06,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,537 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,552 INFO L175 MemorySlicer]: Split 22 memory accesses to 5 slices as follows [2, 8, 4, 4, 4]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 6 writes are split as follows [0, 0, 2, 2, 2]. [2024-11-16 02:55:06,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,560 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:55:06,567 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:55:06,567 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:55:06,567 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:55:06,568 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (1/1) ... [2024-11-16 02:55:06,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:55:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:06,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:55:06,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:55:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:55:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 02:55:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 02:55:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:55:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:55:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:55:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:55:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:55:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:55:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 02:55:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 02:55:06,726 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:55:06,728 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:55:06,902 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-16 02:55:06,902 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:55:06,912 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:55:06,912 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:55:06,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:55:06 BoogieIcfgContainer [2024-11-16 02:55:06,913 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:55:06,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:55:06,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:55:06,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:55:06,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:55:06" (1/3) ... [2024-11-16 02:55:06,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c8662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:55:06, skipping insertion in model container [2024-11-16 02:55:06,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:55:06" (2/3) ... [2024-11-16 02:55:06,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c8662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:55:06, skipping insertion in model container [2024-11-16 02:55:06,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:55:06" (3/3) ... [2024-11-16 02:55:06,922 INFO L112 eAbstractionObserver]: Analyzing ICFG pcomp.c [2024-11-16 02:55:06,938 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:55:06,938 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:55:07,007 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:55:07,027 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;@7cc00ba6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:55:07,027 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:55:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 02:55:07,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:07,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:07,048 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:07,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1414652143, now seen corresponding path program 1 times [2024-11-16 02:55:07,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:07,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644484594] [2024-11-16 02:55:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:07,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644484594] [2024-11-16 02:55:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644484594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:55:07,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:55:07,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:55:07,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063802842] [2024-11-16 02:55:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:55:07,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:55:07,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:55:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:55:07,321 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:07,337 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2024-11-16 02:55:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:55:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-16 02:55:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:07,347 INFO L225 Difference]: With dead ends: 47 [2024-11-16 02:55:07,347 INFO L226 Difference]: Without dead ends: 21 [2024-11-16 02:55:07,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:55:07,353 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:07,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:55:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-16 02:55:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-16 02:55:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-16 02:55:07,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2024-11-16 02:55:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:07,389 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-16 02:55:07,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-16 02:55:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-16 02:55:07,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:07,391 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:07,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:55:07,392 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:07,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash 161578712, now seen corresponding path program 1 times [2024-11-16 02:55:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:07,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013549090] [2024-11-16 02:55:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51384824] [2024-11-16 02:55:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:07,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:07,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:07,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:55:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:07,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-16 02:55:07,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:07,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:07,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:55:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013549090] [2024-11-16 02:55:07,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:55:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51384824] [2024-11-16 02:55:07,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51384824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:55:07,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:55:07,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:55:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668293538] [2024-11-16 02:55:07,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:55:07,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:55:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:55:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:55:07,749 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:07,824 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-16 02:55:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:55:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-16 02:55:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:07,826 INFO L225 Difference]: With dead ends: 38 [2024-11-16 02:55:07,827 INFO L226 Difference]: Without dead ends: 35 [2024-11-16 02:55:07,827 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:55:07,828 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:07,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:55:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-16 02:55:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-11-16 02:55:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-16 02:55:07,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2024-11-16 02:55:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:07,838 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-16 02:55:07,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-16 02:55:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 02:55:07,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:07,839 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:07,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:55:08,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:08,042 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:08,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 809151927, now seen corresponding path program 1 times [2024-11-16 02:55:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:08,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363508537] [2024-11-16 02:55:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363508537] [2024-11-16 02:55:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363508537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:55:08,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:55:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:55:08,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509466673] [2024-11-16 02:55:08,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:55:08,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:55:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:55:08,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:55:08,306 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:08,371 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-11-16 02:55:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:55:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-16 02:55:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:08,373 INFO L225 Difference]: With dead ends: 63 [2024-11-16 02:55:08,373 INFO L226 Difference]: Without dead ends: 44 [2024-11-16 02:55:08,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:55:08,375 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:08,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:55:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-16 02:55:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-11-16 02:55:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-11-16 02:55:08,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-11-16 02:55:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:08,382 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-11-16 02:55:08,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-11-16 02:55:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 02:55:08,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:08,383 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:08,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 02:55:08,384 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:08,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2065690463, now seen corresponding path program 1 times [2024-11-16 02:55:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421270357] [2024-11-16 02:55:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421270357] [2024-11-16 02:55:08,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421270357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:55:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761673918] [2024-11-16 02:55:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:08,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:08,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:08,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:08,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:55:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:08,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 02:55:08,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:55:08,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:55:08,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761673918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:55:08,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:55:08,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-11-16 02:55:08,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506614182] [2024-11-16 02:55:08,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:55:08,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 02:55:08,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 02:55:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:55:08,751 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2024-11-16 02:55:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:08,852 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-11-16 02:55:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:55:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) Word has length 23 [2024-11-16 02:55:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:08,854 INFO L225 Difference]: With dead ends: 54 [2024-11-16 02:55:08,855 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 02:55:08,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:55:08,857 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:08,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:55:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 02:55:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-11-16 02:55:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-16 02:55:08,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2024-11-16 02:55:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:08,863 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-16 02:55:08,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2024-11-16 02:55:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-16 02:55:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-16 02:55:08,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:08,864 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:08,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:55:09,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:55:09,069 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:09,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1452536439, now seen corresponding path program 1 times [2024-11-16 02:55:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:09,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292018616] [2024-11-16 02:55:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:09,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842812903] [2024-11-16 02:55:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:09,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:09,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:09,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:09,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:55:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:09,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 02:55:09,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:09,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:09,394 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 17 treesize of output 13 [2024-11-16 02:55:09,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-16 02:55:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:55:09,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:09,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:55:09,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2024-11-16 02:55:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:55:09,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292018616] [2024-11-16 02:55:09,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:55:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842812903] [2024-11-16 02:55:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842812903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:09,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:55:09,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2024-11-16 02:55:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453241903] [2024-11-16 02:55:09,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:09,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 02:55:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 02:55:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:55:09,940 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:14,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-16 02:55:18,637 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 [1] [2024-11-16 02:55:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:18,658 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-16 02:55:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:55:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-16 02:55:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:18,664 INFO L225 Difference]: With dead ends: 64 [2024-11-16 02:55:18,664 INFO L226 Difference]: Without dead ends: 61 [2024-11-16 02:55:18,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-16 02:55:18,668 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:18,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 87 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-16 02:55:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-16 02:55:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2024-11-16 02:55:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2024-11-16 02:55:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-16 02:55:18,678 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2024-11-16 02:55:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:18,678 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-16 02:55:18,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-16 02:55:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 02:55:18,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:18,679 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:18,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 02:55:18,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:18,880 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:18,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1549892478, now seen corresponding path program 1 times [2024-11-16 02:55:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:18,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623824954] [2024-11-16 02:55:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:18,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839032209] [2024-11-16 02:55:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:18,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:18,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:18,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:18,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:55:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:19,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 02:55:19,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:19,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:19,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:19,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:55:19,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-16 02:55:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:55:19,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:55:19,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:19,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623824954] [2024-11-16 02:55:19,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 02:55:19,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839032209] [2024-11-16 02:55:19,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839032209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:19,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:55:19,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2024-11-16 02:55:19,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116645705] [2024-11-16 02:55:19,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:19,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:55:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:55:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:55:19,986 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:20,795 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-11-16 02:55:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:55:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 29 [2024-11-16 02:55:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:20,796 INFO L225 Difference]: With dead ends: 95 [2024-11-16 02:55:20,797 INFO L226 Difference]: Without dead ends: 92 [2024-11-16 02:55:20,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:55:20,798 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:20,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 159 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:55:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-16 02:55:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2024-11-16 02:55:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-16 02:55:20,809 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 29 [2024-11-16 02:55:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:20,809 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-16 02:55:20,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-16 02:55:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-16 02:55:20,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:20,811 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:20,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 02:55:21,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:21,011 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:21,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -159044363, now seen corresponding path program 2 times [2024-11-16 02:55:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:21,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946104021] [2024-11-16 02:55:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:55:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946104021] [2024-11-16 02:55:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946104021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:55:21,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240858436] [2024-11-16 02:55:21,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:55:21,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:21,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:21,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:55:21,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:55:21,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:55:21,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 02:55:21,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:55:21,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:55:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240858436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:21,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:55:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-16 02:55:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661467893] [2024-11-16 02:55:21,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:21,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 02:55:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 02:55:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:55:21,442 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:21,745 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2024-11-16 02:55:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 02:55:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-16 02:55:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:21,751 INFO L225 Difference]: With dead ends: 171 [2024-11-16 02:55:21,751 INFO L226 Difference]: Without dead ends: 107 [2024-11-16 02:55:21,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2024-11-16 02:55:21,752 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:21,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 128 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:55:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-16 02:55:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2024-11-16 02:55:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-11-16 02:55:21,772 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 29 [2024-11-16 02:55:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:21,773 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-11-16 02:55:21,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-11-16 02:55:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 02:55:21,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:21,774 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:21,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:55:21,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:21,975 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:21,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1721638526, now seen corresponding path program 2 times [2024-11-16 02:55:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:21,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484313221] [2024-11-16 02:55:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:55:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:55:22,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:55:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484313221] [2024-11-16 02:55:22,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484313221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:55:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677156894] [2024-11-16 02:55:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:55:22,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:22,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:22,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:55:22,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:55:22,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:55:22,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 02:55:22,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:55:22,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:55:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677156894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:55:22,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:55:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-16 02:55:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823906921] [2024-11-16 02:55:22,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:55:22,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:55:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:55:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:55:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:55:22,450 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:55:22,814 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2024-11-16 02:55:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:55:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-16 02:55:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:55:22,815 INFO L225 Difference]: With dead ends: 123 [2024-11-16 02:55:22,815 INFO L226 Difference]: Without dead ends: 92 [2024-11-16 02:55:22,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:55:22,817 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:55:22,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 230 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:55:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-16 02:55:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2024-11-16 02:55:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-11-16 02:55:22,829 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 37 [2024-11-16 02:55:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:55:22,829 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-11-16 02:55:22,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:55:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-11-16 02:55:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 02:55:22,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:55:22,830 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:55:22,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:55:23,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:23,034 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:55:23,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:55:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash 12701685, now seen corresponding path program 3 times [2024-11-16 02:55:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:55:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100907461] [2024-11-16 02:55:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:55:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:55:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 02:55:23,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225003066] [2024-11-16 02:55:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:55:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:55:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:55:23,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:55:23,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:55:23,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:55:23,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:55:23,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 02:55:23,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:55:23,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 02:55:24,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-16 02:55:24,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:55:24,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2024-11-16 02:55:24,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:55:24,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 40 [2024-11-16 02:55:24,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:55:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:55:24,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:55:44,802 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:55:52,860 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-16 02:56:29,849 WARN L286 SmtUtils]: Spent 32.77s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 02:56:46,032 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)