./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:49:32,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:49:32,803 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:49:32,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:49:32,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:49:32,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:49:32,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:49:32,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:49:32,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:49:32,847 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:49:32,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:49:32,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:49:32,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:49:32,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:49:32,850 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:49:32,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:49:32,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:49:32,851 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:49:32,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:49:32,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:49:32,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:49:32,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:49:32,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:49:32,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:49:32,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:49:32,854 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:49:32,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:49:32,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:49:32,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:49:32,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:49:32,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:49:32,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:49:32,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:49:32,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:49:32,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:49:32,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:49:32,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:49:32,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:49:32,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:49:32,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:49:32,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:49:32,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:49:32,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-10-12 14:49:33,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:49:33,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:49:33,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:49:33,165 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:49:33,166 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:49:33,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-10-12 14:49:34,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:49:34,874 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:49:34,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-10-12 14:49:34,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d7d02bf/623566f28e424109a35015302186d765/FLAG7f7393b5a [2024-10-12 14:49:35,249 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d7d02bf/623566f28e424109a35015302186d765 [2024-10-12 14:49:35,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:49:35,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:49:35,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:49:35,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:49:35,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:49:35,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66219036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35, skipping insertion in model container [2024-10-12 14:49:35,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,288 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:49:35,478 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-10-12 14:49:35,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:49:35,492 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:49:35,512 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-10-12 14:49:35,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:49:35,532 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:49:35,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35 WrapperNode [2024-10-12 14:49:35,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:49:35,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:49:35,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:49:35,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:49:35,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,567 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-10-12 14:49:35,568 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:49:35,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:49:35,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:49:35,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:49:35,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,597 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 11, 7]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7]. The 5 writes are split as follows [0, 5, 0]. [2024-10-12 14:49:35,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,621 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:49:35,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:49:35,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:49:35,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:49:35,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (1/1) ... [2024-10-12 14:49:35,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:49:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:35,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:49:35,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:49:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:49:35,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:49:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:49:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:49:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:49:35,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:49:35,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:49:35,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:49:35,726 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-10-12 14:49:35,726 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-10-12 14:49:35,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:49:35,823 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:49:35,825 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:49:36,051 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-10-12 14:49:36,051 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:49:36,081 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:49:36,081 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:49:36,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:49:36 BoogieIcfgContainer [2024-10-12 14:49:36,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:49:36,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:49:36,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:49:36,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:49:36,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:49:35" (1/3) ... [2024-10-12 14:49:36,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7728622d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:49:36, skipping insertion in model container [2024-10-12 14:49:36,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:49:35" (2/3) ... [2024-10-12 14:49:36,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7728622d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:49:36, skipping insertion in model container [2024-10-12 14:49:36,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:49:36" (3/3) ... [2024-10-12 14:49:36,092 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-10-12 14:49:36,107 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:49:36,107 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:49:36,159 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:49:36,165 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;@76467db9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:49:36,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:49:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:49:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:49:36,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:36,192 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:36,192 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:36,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1111550662, now seen corresponding path program 1 times [2024-10-12 14:49:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024425412] [2024-10-12 14:49:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:49:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 14:49:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:49:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:36,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024425412] [2024-10-12 14:49:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024425412] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:36,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:49:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:49:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236602977] [2024-10-12 14:49:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:36,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:49:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:49:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:49:36,509 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:49:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:36,551 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-10-12 14:49:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:49:36,553 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-12 14:49:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:36,558 INFO L225 Difference]: With dead ends: 51 [2024-10-12 14:49:36,559 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 14:49:36,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:49:36,564 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:36,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 14:49:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-12 14:49:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:49:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-12 14:49:36,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2024-10-12 14:49:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:36,596 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-12 14:49:36,596 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:49:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-12 14:49:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:49:36,600 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:36,600 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:36,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:49:36,601 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:36,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1819042790, now seen corresponding path program 1 times [2024-10-12 14:49:36,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:36,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026104826] [2024-10-12 14:49:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:36,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-12 14:49:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-12 14:49:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-12 14:49:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:36,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026104826] [2024-10-12 14:49:36,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026104826] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:36,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:49:36,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:49:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408763942] [2024-10-12 14:49:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:36,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:49:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:49:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:49:36,828 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:49:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:36,861 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-10-12 14:49:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:49:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-12 14:49:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:36,862 INFO L225 Difference]: With dead ends: 46 [2024-10-12 14:49:36,863 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 14:49:36,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:49:36,864 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:36,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 14:49:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-12 14:49:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:49:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-12 14:49:36,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 26 [2024-10-12 14:49:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:36,872 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-12 14:49:36,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-12 14:49:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-12 14:49:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 14:49:36,873 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:36,873 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:36,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:49:36,874 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:36,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 293893811, now seen corresponding path program 1 times [2024-10-12 14:49:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:36,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051719291] [2024-10-12 14:49:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-12 14:49:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-12 14:49:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-12 14:49:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-12 14:49:37,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051719291] [2024-10-12 14:49:37,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051719291] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118770793] [2024-10-12 14:49:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:37,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:37,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:37,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:49:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:49:37,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:37,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 14:49:37,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118770793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:37,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:37,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-10-12 14:49:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152591598] [2024-10-12 14:49:37,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:37,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 14:49:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 14:49:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-12 14:49:37,356 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:49:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:37,447 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2024-10-12 14:49:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:49:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27 [2024-10-12 14:49:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:37,449 INFO L225 Difference]: With dead ends: 53 [2024-10-12 14:49:37,449 INFO L226 Difference]: Without dead ends: 32 [2024-10-12 14:49:37,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-12 14:49:37,450 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:37,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 81 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-12 14:49:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-10-12 14:49:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:49:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-12 14:49:37,461 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 27 [2024-10-12 14:49:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:37,461 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-12 14:49:37,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-12 14:49:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-12 14:49:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-12 14:49:37,463 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:37,463 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:37,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:37,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:37,664 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:37,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126435, now seen corresponding path program 1 times [2024-10-12 14:49:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124673989] [2024-10-12 14:49:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:49:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:49:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-12 14:49:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-12 14:49:37,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124673989] [2024-10-12 14:49:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124673989] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50973724] [2024-10-12 14:49:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:37,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:37,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:49:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:37,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:49:37,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-12 14:49:38,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:49:38,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50973724] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:49:38,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:49:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-12 14:49:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387707276] [2024-10-12 14:49:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:49:38,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:49:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:49:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:49:38,043 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:49:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:38,092 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-10-12 14:49:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:49:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-10-12 14:49:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:38,094 INFO L225 Difference]: With dead ends: 44 [2024-10-12 14:49:38,094 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 14:49:38,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-12 14:49:38,096 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:38,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:49:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 14:49:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-12 14:49:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-12 14:49:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-10-12 14:49:38,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 37 [2024-10-12 14:49:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:38,109 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-10-12 14:49:38,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-12 14:49:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-10-12 14:49:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 14:49:38,111 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:38,111 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:38,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:38,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-12 14:49:38,312 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:38,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1906014821, now seen corresponding path program 1 times [2024-10-12 14:49:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205462374] [2024-10-12 14:49:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:40,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:49:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:40,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:49:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:40,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:49:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-12 14:49:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205462374] [2024-10-12 14:49:40,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205462374] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156472262] [2024-10-12 14:49:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:40,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:40,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:40,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:49:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:41,067 WARN L253 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-12 14:49:41,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:41,165 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 [2024-10-12 14:49:41,595 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 64 treesize of output 33 [2024-10-12 14:49:42,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:42,446 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-10-12 14:49:42,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:42,648 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-10-12 14:49:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:49:43,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156472262] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:45,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:49:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 52 [2024-10-12 14:49:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694903142] [2024-10-12 14:49:45,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:45,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-12 14:49:45,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-12 14:49:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=4368, Unknown=0, NotChecked=0, Total=4692 [2024-10-12 14:49:45,935 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 14:49:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:48,479 INFO L93 Difference]: Finished difference Result 148 states and 209 transitions. [2024-10-12 14:49:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-12 14:49:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2024-10-12 14:49:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:48,483 INFO L225 Difference]: With dead ends: 148 [2024-10-12 14:49:48,484 INFO L226 Difference]: Without dead ends: 144 [2024-10-12 14:49:48,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2782 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=700, Invalid=8230, Unknown=0, NotChecked=0, Total=8930 [2024-10-12 14:49:48,488 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:48,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 244 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-12 14:49:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-12 14:49:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2024-10-12 14:49:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 68 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-12 14:49:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2024-10-12 14:49:48,513 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 38 [2024-10-12 14:49:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:48,514 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2024-10-12 14:49:48,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-12 14:49:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2024-10-12 14:49:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:49:48,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:48,516 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:49:48,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:48,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:48,717 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:48,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1003666764, now seen corresponding path program 2 times [2024-10-12 14:49:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485340725] [2024-10-12 14:49:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:48,832 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-12 14:49:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:48,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:49:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:48,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 14:49:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:49:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485340725] [2024-10-12 14:49:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485340725] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019966766] [2024-10-12 14:49:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:49:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:48,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:48,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:49:48,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:49:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:48,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 14:49:48,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-12 14:49:49,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-12 14:49:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019966766] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:49,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:49,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-10-12 14:49:49,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268561976] [2024-10-12 14:49:49,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:49,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:49:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:49:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:49:49,109 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:49:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:49,299 INFO L93 Difference]: Finished difference Result 197 states and 289 transitions. [2024-10-12 14:49:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 14:49:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-10-12 14:49:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:49,301 INFO L225 Difference]: With dead ends: 197 [2024-10-12 14:49:49,302 INFO L226 Difference]: Without dead ends: 176 [2024-10-12 14:49:49,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:49:49,303 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 113 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:49,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 343 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:49:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-12 14:49:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 85. [2024-10-12 14:49:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 74 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-12 14:49:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 119 transitions. [2024-10-12 14:49:49,325 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 119 transitions. Word has length 39 [2024-10-12 14:49:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:49,325 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 119 transitions. [2024-10-12 14:49:49,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-12 14:49:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 119 transitions. [2024-10-12 14:49:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:49:49,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:49,327 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-10-12 14:49:49,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:49,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:49,530 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:49,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1009517099, now seen corresponding path program 1 times [2024-10-12 14:49:49,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:49,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718318835] [2024-10-12 14:49:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:49,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:49,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:49:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:49,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:49:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:49,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-12 14:49:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:49:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718318835] [2024-10-12 14:49:50,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718318835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661933522] [2024-10-12 14:49:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:50,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:50,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:50,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:49:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:50,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-12 14:49:50,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:50,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:49:50,217 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-12 14:49:50,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-12 14:49:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:49:50,355 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-12 14:49:50,356 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2024-10-12 14:49:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:49:50,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:50,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661933522] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:50,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:49:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2024-10-12 14:49:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28557096] [2024-10-12 14:49:50,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:50,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 14:49:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 14:49:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:49:50,649 INFO L87 Difference]: Start difference. First operand 85 states and 119 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-12 14:49:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:49:51,226 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2024-10-12 14:49:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 14:49:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2024-10-12 14:49:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:49:51,229 INFO L225 Difference]: With dead ends: 314 [2024-10-12 14:49:51,229 INFO L226 Difference]: Without dead ends: 277 [2024-10-12 14:49:51,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:49:51,231 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:49:51,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 289 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:49:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-10-12 14:49:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 203. [2024-10-12 14:49:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 176 states have (on average 1.4204545454545454) internal successors, (250), 182 states have internal predecessors, (250), 13 states have call successors, (13), 9 states have call predecessors, (13), 13 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2024-10-12 14:49:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 286 transitions. [2024-10-12 14:49:51,285 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 286 transitions. Word has length 39 [2024-10-12 14:49:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:49:51,287 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 286 transitions. [2024-10-12 14:49:51,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-12 14:49:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 286 transitions. [2024-10-12 14:49:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:49:51,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:49:51,290 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-10-12 14:49:51,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 14:49:51,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:51,491 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:49:51,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:49:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1849221081, now seen corresponding path program 2 times [2024-10-12 14:49:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:49:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634998398] [2024-10-12 14:49:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:49:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:49:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:53,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:49:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:53,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-12 14:49:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:53,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 14:49:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:49:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-12 14:49:53,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:49:53,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634998398] [2024-10-12 14:49:53,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634998398] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:49:53,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603892785] [2024-10-12 14:49:53,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:49:53,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:49:53,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:49:53,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:49:53,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:49:54,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:49:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:49:54,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-12 14:49:54,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:49:54,114 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 [2024-10-12 14:49:54,510 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 64 treesize of output 33 [2024-10-12 14:49:54,943 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 80 treesize of output 48 [2024-10-12 14:49:55,129 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 [2024-10-12 14:49:55,446 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 114 treesize of output 70 [2024-10-12 14:49:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:49:55,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:49:56,000 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 45 treesize of output 41 [2024-10-12 14:49:56,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 56 treesize of output 48 [2024-10-12 14:49:56,030 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 43 treesize of output 39 [2024-10-12 14:49:56,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 44 [2024-10-12 14:49:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:49:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603892785] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:49:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:49:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 26] total 66 [2024-10-12 14:49:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783969439] [2024-10-12 14:49:57,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:49:57,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-12 14:49:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:49:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-12 14:49:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3986, Unknown=0, NotChecked=0, Total=4290 [2024-10-12 14:49:57,243 INFO L87 Difference]: Start difference. First operand 203 states and 286 transitions. Second operand has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:50:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:50:00,116 INFO L93 Difference]: Finished difference Result 468 states and 691 transitions. [2024-10-12 14:50:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-12 14:50:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 39 [2024-10-12 14:50:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:50:00,120 INFO L225 Difference]: With dead ends: 468 [2024-10-12 14:50:00,120 INFO L226 Difference]: Without dead ends: 462 [2024-10-12 14:50:00,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=694, Invalid=9206, Unknown=0, NotChecked=0, Total=9900 [2024-10-12 14:50:00,123 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 206 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:50:00,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 237 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-12 14:50:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-10-12 14:50:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 225. [2024-10-12 14:50:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 203 states have internal predecessors, (278), 15 states have call successors, (15), 9 states have call predecessors, (15), 15 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) [2024-10-12 14:50:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 321 transitions. [2024-10-12 14:50:00,182 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 321 transitions. Word has length 39 [2024-10-12 14:50:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:50:00,183 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 321 transitions. [2024-10-12 14:50:00,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-12 14:50:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 321 transitions. [2024-10-12 14:50:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-12 14:50:00,185 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:50:00,185 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-10-12 14:50:00,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 14:50:00,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:00,386 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:50:00,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:50:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1778168871, now seen corresponding path program 3 times [2024-10-12 14:50:00,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:50:00,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563447810] [2024-10-12 14:50:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:50:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:50:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:00,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-12 14:50:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:00,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-12 14:50:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:00,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-12 14:50:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:50:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 14:50:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:50:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563447810] [2024-10-12 14:50:00,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563447810] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:00,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268017950] [2024-10-12 14:50:00,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:50:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:50:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:50:00,958 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) [2024-10-12 14:50:00,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:50:01,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 14:50:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:50:01,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-12 14:50:01,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:50:01,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:50:01,169 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2024-10-12 14:50:01,281 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 24 treesize of output 19 [2024-10-12 14:50:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:50:01,331 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-12 14:50:01,332 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-10-12 14:50:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:50:01,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:50:13,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268017950] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:50:13,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 14:50:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2024-10-12 14:50:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537701134] [2024-10-12 14:50:13,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 14:50:13,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 14:50:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:50:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 14:50:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=835, Unknown=3, NotChecked=0, Total=992 [2024-10-12 14:50:13,628 INFO L87 Difference]: Start difference. First operand 225 states and 321 transitions. Second operand has 26 states, 25 states have (on average 2.36) internal successors, (59), 23 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-12 14:50:17,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:21,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:25,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:29,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:33,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:37,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:41,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:45,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:49,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:53,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:50:57,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:51:01,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]