./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i -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 b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 01:50:54,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 01:50:54,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 01:50:54,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 01:50:54,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 01:50:54,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 01:50:54,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 01:50:54,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 01:50:54,517 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 01:50:54,517 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 01:50:54,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 01:50:54,518 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 01:50:54,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 01:50:54,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 01:50:54,523 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 01:50:54,523 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 01:50:54,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 01:50:54,523 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 01:50:54,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 01:50:54,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 01:50:54,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 01:50:54,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 01:50:54,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 01:50:54,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 01:50:54,528 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 01:50:54,528 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 01:50:54,529 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 01:50:54,529 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 01:50:54,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 01:50:54,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 01:50:54,530 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 01:50:54,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 01:50:54,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:50:54,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 01:50:54,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 01:50:54,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 01:50:54,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 01:50:54,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 01:50:54,533 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 01:50:54,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 01:50:54,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 01:50:54,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 01:50:54,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2024-10-14 01:50:54,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 01:50:54,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 01:50:54,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 01:50:54,826 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 01:50:54,827 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 01:50:54,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2024-10-14 01:50:56,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 01:50:56,506 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 01:50:56,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2024-10-14 01:50:56,531 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d58e17e5/c028a2a7bac54d66bf166e20d6f62520/FLAG4cc7a7cf3 [2024-10-14 01:50:56,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d58e17e5/c028a2a7bac54d66bf166e20d6f62520 [2024-10-14 01:50:56,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 01:50:56,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 01:50:56,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 01:50:56,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 01:50:56,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 01:50:56,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:50:56" (1/1) ... [2024-10-14 01:50:56,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b501df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:56, skipping insertion in model container [2024-10-14 01:50:56,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:50:56" (1/1) ... [2024-10-14 01:50:56,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 01:50:57,101 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2024-10-14 01:50:57,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:50:57,279 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 01:50:57,293 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2024-10-14 01:50:57,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 01:50:57,395 INFO L204 MainTranslator]: Completed translation [2024-10-14 01:50:57,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57 WrapperNode [2024-10-14 01:50:57,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 01:50:57,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 01:50:57,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 01:50:57,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 01:50:57,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,458 INFO L138 Inliner]: procedures = 226, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2024-10-14 01:50:57,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 01:50:57,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 01:50:57,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 01:50:57,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 01:50:57,471 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,501 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-14 01:50:57,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,522 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 01:50:57,530 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 01:50:57,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 01:50:57,532 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 01:50:57,533 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (1/1) ... [2024-10-14 01:50:57,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 01:50:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:50:57,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 01:50:57,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 01:50:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 01:50:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 01:50:57,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 01:50:57,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 01:50:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 01:50:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 01:50:57,618 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2024-10-14 01:50:57,619 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2024-10-14 01:50:57,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 01:50:57,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 01:50:57,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 01:50:57,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 01:50:57,736 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 01:50:57,738 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 01:50:57,921 INFO L? ?]: Removed 39 outVars from TransFormulas that were not future-live. [2024-10-14 01:50:57,921 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 01:50:57,957 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 01:50:57,960 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 01:50:57,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:50:57 BoogieIcfgContainer [2024-10-14 01:50:57,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 01:50:57,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 01:50:57,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 01:50:57,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 01:50:57,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:50:56" (1/3) ... [2024-10-14 01:50:57,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155289d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:50:57, skipping insertion in model container [2024-10-14 01:50:57,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:50:57" (2/3) ... [2024-10-14 01:50:57,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155289d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:50:57, skipping insertion in model container [2024-10-14 01:50:57,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:50:57" (3/3) ... [2024-10-14 01:50:57,969 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2024-10-14 01:50:58,011 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 01:50:58,017 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 01:50:58,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 01:50:58,112 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;@2a68df3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 01:50:58,112 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 01:50:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:50:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 01:50:58,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:50:58,130 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:50:58,133 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:50:58,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:50:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash -591880684, now seen corresponding path program 1 times [2024-10-14 01:50:58,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:50:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171259642] [2024-10-14 01:50:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:50:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:50:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:58,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:50:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:58,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:50:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:58,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:50:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:58,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:50:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:50:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:50:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171259642] [2024-10-14 01:50:58,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171259642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:50:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789470159] [2024-10-14 01:50:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:50:58,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:50:58,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:50:58,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:50:58,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 01:50:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-14 01:50:59,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:50:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 01:50:59,108 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 01:50:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789470159] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:50:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 01:50:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2024-10-14 01:50:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255418917] [2024-10-14 01:50:59,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:50:59,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 01:50:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:50:59,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 01:50:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:50:59,138 INFO L87 Difference]: Start difference. First operand has 30 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:50:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:50:59,163 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2024-10-14 01:50:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 01:50:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-10-14 01:50:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:50:59,176 INFO L225 Difference]: With dead ends: 46 [2024-10-14 01:50:59,176 INFO L226 Difference]: Without dead ends: 22 [2024-10-14 01:50:59,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:50:59,183 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:50:59,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:50:59,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-14 01:50:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-14 01:50:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:50:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-14 01:50:59,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 31 [2024-10-14 01:50:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:50:59,220 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-14 01:50:59,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:50:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-14 01:50:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 01:50:59,223 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:50:59,224 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:50:59,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 01:50:59,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-14 01:50:59,427 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:50:59,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:50:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1989752827, now seen corresponding path program 1 times [2024-10-14 01:50:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:50:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097322093] [2024-10-14 01:50:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:50:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:50:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,703 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:50:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:50:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:50:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:50:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 01:50:59,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:50:59,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097322093] [2024-10-14 01:50:59,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097322093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:50:59,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637440121] [2024-10-14 01:50:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:50:59,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:50:59,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:50:59,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:50:59,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 01:50:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:50:59,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 01:50:59,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:51:00,030 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 01:51:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637440121] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:51:00,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 01:51:00,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-10-14 01:51:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558730952] [2024-10-14 01:51:00,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:51:00,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 01:51:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 01:51:00,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 01:51:00,036 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:00,110 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-10-14 01:51:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 01:51:00,112 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-10-14 01:51:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:00,113 INFO L225 Difference]: With dead ends: 44 [2024-10-14 01:51:00,114 INFO L226 Difference]: Without dead ends: 26 [2024-10-14 01:51:00,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 01:51:00,116 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:00,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:51:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-14 01:51:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-10-14 01:51:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:51:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-14 01:51:00,123 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 33 [2024-10-14 01:51:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:00,124 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-14 01:51:00,124 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-14 01:51:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 01:51:00,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:00,125 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:00,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 01:51:00,329 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,SelfDestructingSolverStorable1 [2024-10-14 01:51:00,330 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:00,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2005311893, now seen corresponding path program 1 times [2024-10-14 01:51:00,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:00,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817251231] [2024-10-14 01:51:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:00,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 01:51:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:00,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817251231] [2024-10-14 01:51:00,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817251231] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 01:51:00,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 01:51:00,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 01:51:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974922884] [2024-10-14 01:51:00,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:51:00,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 01:51:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 01:51:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 01:51:00,626 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:00,694 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-10-14 01:51:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 01:51:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-10-14 01:51:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:00,696 INFO L225 Difference]: With dead ends: 30 [2024-10-14 01:51:00,696 INFO L226 Difference]: Without dead ends: 26 [2024-10-14 01:51:00,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-14 01:51:00,697 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:00,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 01:51:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-14 01:51:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-14 01:51:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:51:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-14 01:51:00,706 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 34 [2024-10-14 01:51:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:00,707 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-14 01:51:00,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-14 01:51:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 01:51:00,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:00,709 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:00,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 01:51:00,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:00,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2003464851, now seen corresponding path program 1 times [2024-10-14 01:51:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059994851] [2024-10-14 01:51:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,943 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:00,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:51:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059994851] [2024-10-14 01:51:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059994851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242510920] [2024-10-14 01:51:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:01,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:51:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 01:51:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:01,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 01:51:01,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:51:01,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:51:01,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242510920] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:01,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 01:51:01,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 17 [2024-10-14 01:51:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079901012] [2024-10-14 01:51:01,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 01:51:01,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 01:51:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 01:51:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-10-14 01:51:01,548 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:01,726 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-14 01:51:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 01:51:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-10-14 01:51:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:01,728 INFO L225 Difference]: With dead ends: 38 [2024-10-14 01:51:01,729 INFO L226 Difference]: Without dead ends: 30 [2024-10-14 01:51:01,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-10-14 01:51:01,730 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:01,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 77 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 01:51:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-14 01:51:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-10-14 01:51:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 01:51:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-10-14 01:51:01,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 34 [2024-10-14 01:51:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:01,742 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-10-14 01:51:01,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-14 01:51:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-10-14 01:51:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 01:51:01,746 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:01,746 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:01,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 01:51:01,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:01,947 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:01,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2075934852, now seen corresponding path program 1 times [2024-10-14 01:51:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395565570] [2024-10-14 01:51:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:51:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395565570] [2024-10-14 01:51:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395565570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:02,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309448925] [2024-10-14 01:51:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:02,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:51:02,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 01:51:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:02,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 01:51:02,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:02,856 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 13 treesize of output 9 [2024-10-14 01:51:02,950 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 20 treesize of output 8 [2024-10-14 01:51:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:51:02,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:51:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309448925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 01:51:03,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 01:51:03,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2024-10-14 01:51:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107097235] [2024-10-14 01:51:03,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 01:51:03,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 01:51:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 01:51:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2024-10-14 01:51:03,147 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 23 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-14 01:51:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:03,768 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-10-14 01:51:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 01:51:03,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2024-10-14 01:51:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:03,771 INFO L225 Difference]: With dead ends: 51 [2024-10-14 01:51:03,771 INFO L226 Difference]: Without dead ends: 40 [2024-10-14 01:51:03,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 01:51:03,773 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:03,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 144 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 01:51:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-14 01:51:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2024-10-14 01:51:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-10-14 01:51:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-10-14 01:51:03,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 37 [2024-10-14 01:51:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:03,782 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-10-14 01:51:03,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.3) internal successors, (46), 21 states have internal predecessors, (46), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-14 01:51:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-10-14 01:51:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 01:51:03,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:03,784 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, 1, 1, 1, 1] [2024-10-14 01:51:03,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 01:51:03,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:03,989 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:03,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -61018985, now seen corresponding path program 2 times [2024-10-14 01:51:03,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:03,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233662304] [2024-10-14 01:51:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:04,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:04,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:04,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:04,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 01:51:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233662304] [2024-10-14 01:51:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233662304] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759546849] [2024-10-14 01:51:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 01:51:05,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:05,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:05,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:51:05,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 01:51:05,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 01:51:05,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:51:05,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-14 01:51:05,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:05,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:05,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:05,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:05,667 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:05,668 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 1 case distinctions, treesize of input 21 treesize of output 24 [2024-10-14 01:51:05,766 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 7 treesize of output 3 [2024-10-14 01:51:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 01:51:05,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:06,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:06,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2024-10-14 01:51:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759546849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:06,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 01:51:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2024-10-14 01:51:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756160617] [2024-10-14 01:51:06,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 01:51:06,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 01:51:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 01:51:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 01:51:06,075 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 31 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-14 01:51:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:07,122 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-10-14 01:51:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 01:51:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 41 [2024-10-14 01:51:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:07,124 INFO L225 Difference]: With dead ends: 60 [2024-10-14 01:51:07,125 INFO L226 Difference]: Without dead ends: 46 [2024-10-14 01:51:07,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=442, Invalid=2638, Unknown=0, NotChecked=0, Total=3080 [2024-10-14 01:51:07,127 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:07,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 146 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 01:51:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-14 01:51:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2024-10-14 01:51:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 01:51:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-14 01:51:07,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 41 [2024-10-14 01:51:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:07,136 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-14 01:51:07,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-10-14 01:51:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-14 01:51:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 01:51:07,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:07,138 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:07,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 01:51:07,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:07,342 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:07,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1364250701, now seen corresponding path program 3 times [2024-10-14 01:51:07,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544438622] [2024-10-14 01:51:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:08,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:08,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:08,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:08,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 01:51:08,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544438622] [2024-10-14 01:51:08,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544438622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964196379] [2024-10-14 01:51:08,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 01:51:08,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:08,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:51:08,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 01:51:08,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 01:51:08,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:51:08,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-14 01:51:08,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:08,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:51:08,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:08,621 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 15 treesize of output 1 [2024-10-14 01:51:08,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:08,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:08,943 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:08,943 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 1 case distinctions, treesize of input 34 treesize of output 37 [2024-10-14 01:51:08,959 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:08,960 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 1 case distinctions, treesize of input 28 treesize of output 31 [2024-10-14 01:51:08,999 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-10-14 01:51:08,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-14 01:51:09,339 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2024-10-14 01:51:09,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 86 [2024-10-14 01:51:09,402 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2024-10-14 01:51:09,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 71 [2024-10-14 01:51:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 01:51:09,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:10,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:10,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2024-10-14 01:51:10,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:10,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2024-10-14 01:51:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964196379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:10,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 01:51:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2024-10-14 01:51:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791406421] [2024-10-14 01:51:10,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 01:51:10,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 01:51:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 01:51:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 01:51:10,176 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 30 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-14 01:51:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:11,200 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2024-10-14 01:51:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 01:51:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2024-10-14 01:51:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:11,202 INFO L225 Difference]: With dead ends: 58 [2024-10-14 01:51:11,202 INFO L226 Difference]: Without dead ends: 50 [2024-10-14 01:51:11,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2024-10-14 01:51:11,204 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:11,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 211 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 01:51:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-14 01:51:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2024-10-14 01:51:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 01:51:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2024-10-14 01:51:11,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 42 [2024-10-14 01:51:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:11,217 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2024-10-14 01:51:11,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-14 01:51:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2024-10-14 01:51:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 01:51:11,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:11,219 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 01:51:11,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:11,424 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:11,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -602992484, now seen corresponding path program 4 times [2024-10-14 01:51:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:11,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966739008] [2024-10-14 01:51:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:12,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:12,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:12,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:13,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:51:13,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966739008] [2024-10-14 01:51:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966739008] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661494200] [2024-10-14 01:51:13,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 01:51:13,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:13,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:13,474 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) [2024-10-14 01:51:13,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 01:51:13,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 01:51:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:51:13,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-14 01:51:13,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:13,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:51:13,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:13,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:13,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:13,992 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:13,992 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 1 case distinctions, treesize of input 21 treesize of output 24 [2024-10-14 01:51:14,009 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-10-14 01:51:14,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-10-14 01:51:14,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2024-10-14 01:51:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2024-10-14 01:51:14,230 INFO L349 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2024-10-14 01:51:14,230 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 1 case distinctions, treesize of input 22 treesize of output 27 [2024-10-14 01:51:14,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:14,244 INFO L349 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2024-10-14 01:51:14,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 47 [2024-10-14 01:51:14,259 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-14 01:51:14,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-10-14 01:51:14,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-14 01:51:14,673 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-10-14 01:51:14,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 26 [2024-10-14 01:51:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 01:51:14,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:14,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:14,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2024-10-14 01:51:14,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:14,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2024-10-14 01:51:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661494200] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:14,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 01:51:14,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2024-10-14 01:51:14,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846656503] [2024-10-14 01:51:14,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 01:51:14,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-14 01:51:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-14 01:51:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2101, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 01:51:14,949 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 44 states, 38 states have (on average 1.736842105263158) internal successors, (66), 40 states have internal predecessors, (66), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-14 01:51:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:17,214 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2024-10-14 01:51:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-14 01:51:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 1.736842105263158) internal successors, (66), 40 states have internal predecessors, (66), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 45 [2024-10-14 01:51:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:17,216 INFO L225 Difference]: With dead ends: 67 [2024-10-14 01:51:17,216 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 01:51:17,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=737, Invalid=5743, Unknown=0, NotChecked=0, Total=6480 [2024-10-14 01:51:17,221 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:17,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 241 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 01:51:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 01:51:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-10-14 01:51:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-14 01:51:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-10-14 01:51:17,243 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 45 [2024-10-14 01:51:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:17,244 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-10-14 01:51:17,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 1.736842105263158) internal successors, (66), 40 states have internal predecessors, (66), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-14 01:51:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-10-14 01:51:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-14 01:51:17,247 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 01:51:17,248 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 01:51:17,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 01:51:17,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:17,449 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 01:51:17,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 01:51:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1915962899, now seen corresponding path program 5 times [2024-10-14 01:51:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 01:51:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858590560] [2024-10-14 01:51:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 01:51:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 01:51:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:19,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 01:51:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:19,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 01:51:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:19,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 01:51:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:20,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-14 01:51:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 01:51:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:51:20,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 01:51:20,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858590560] [2024-10-14 01:51:20,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858590560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:20,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096911592] [2024-10-14 01:51:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 01:51:20,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 01:51:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 01:51:20,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 01:51:20,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 01:51:20,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-14 01:51:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 01:51:20,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-10-14 01:51:20,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 01:51:20,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 01:51:20,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-10-14 01:51:20,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:20,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 01:51:20,934 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:20,934 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 1 case distinctions, treesize of input 20 treesize of output 23 [2024-10-14 01:51:20,956 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-10-14 01:51:20,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-10-14 01:51:21,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:21,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:21,289 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 01:51:21,289 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 1 case distinctions, treesize of input 20 treesize of output 23 [2024-10-14 01:51:21,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,301 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 65 treesize of output 42 [2024-10-14 01:51:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,320 INFO L349 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2024-10-14 01:51:21,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2024-10-14 01:51:21,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-10-14 01:51:21,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:21,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-10-14 01:51:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,605 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-10-14 01:51:21,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 76 [2024-10-14 01:51:21,617 INFO L349 Elim1Store]: treesize reduction 37, result has 47.1 percent of original size [2024-10-14 01:51:21,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 39 [2024-10-14 01:51:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,633 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2024-10-14 01:51:21,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2024-10-14 01:51:21,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:21,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-10-14 01:51:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:22,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 01:51:22,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2024-10-14 01:51:22,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2024-10-14 01:51:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 01:51:22,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 01:51:22,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:22,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 156 [2024-10-14 01:51:22,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 01:51:22,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 138 [2024-10-14 01:51:23,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096911592] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 01:51:23,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 01:51:23,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 44 [2024-10-14 01:51:23,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303231135] [2024-10-14 01:51:23,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 01:51:23,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-14 01:51:23,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 01:51:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-14 01:51:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2393, Unknown=0, NotChecked=0, Total=2550 [2024-10-14 01:51:23,055 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 44 states, 37 states have (on average 1.864864864864865) internal successors, (69), 41 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-14 01:51:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 01:51:25,049 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2024-10-14 01:51:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 01:51:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.864864864864865) internal successors, (69), 41 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-10-14 01:51:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 01:51:25,050 INFO L225 Difference]: With dead ends: 58 [2024-10-14 01:51:25,050 INFO L226 Difference]: Without dead ends: 0 [2024-10-14 01:51:25,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=348, Invalid=4622, Unknown=0, NotChecked=0, Total=4970 [2024-10-14 01:51:25,052 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 01:51:25,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 147 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 01:51:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-14 01:51:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-14 01:51:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 01:51:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-14 01:51:25,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2024-10-14 01:51:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 01:51:25,054 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-14 01:51:25,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.864864864864865) internal successors, (69), 41 states have internal predecessors, (69), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-14 01:51:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-14 01:51:25,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-14 01:51:25,057 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-14 01:51:25,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 01:51:25,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-14 01:51:25,263 INFO L407 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1] [2024-10-14 01:51:25,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.