./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum_array-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/sum_array-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 14:02:59,793 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 14:02:59,856 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 14:02:59,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 14:02:59,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 14:02:59,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 14:02:59,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 14:02:59,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 14:02:59,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 14:02:59,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 14:02:59,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 14:02:59,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 14:02:59,888 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 14:02:59,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 14:02:59,890 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 14:02:59,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 14:02:59,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 14:02:59,891 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 14:02:59,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 14:02:59,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 14:02:59,891 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 14:02:59,892 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 14:02:59,892 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 14:02:59,892 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 14:02:59,892 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 14:02:59,893 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 14:02:59,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 14:02:59,893 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 14:02:59,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 14:02:59,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 14:02:59,894 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 14:02:59,894 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 14:02:59,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:02:59,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 14:02:59,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 14:02:59,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 14:02:59,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 [2024-11-08 14:03:00,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 14:03:00,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 14:03:00,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 14:03:00,111 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 14:03:00,111 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 14:03:00,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2-2.i [2024-11-08 14:03:01,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 14:03:01,459 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 14:03:01,459 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2-2.i [2024-11-08 14:03:01,467 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976888ee8/c7f717734b74407a8827d7071d331c13/FLAGbefb17969 [2024-11-08 14:03:01,866 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/976888ee8/c7f717734b74407a8827d7071d331c13 [2024-11-08 14:03:01,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 14:03:01,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 14:03:01,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 14:03:01,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 14:03:01,874 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 14:03:01,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:03:01" (1/1) ... [2024-11-08 14:03:01,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3742d912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:01, skipping insertion in model container [2024-11-08 14:03:01,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 02:03:01" (1/1) ... [2024-11-08 14:03:01,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 14:03:02,010 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2-2.i[940,953] [2024-11-08 14:03:02,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:03:02,028 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 14:03:02,037 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2-2.i[940,953] [2024-11-08 14:03:02,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 14:03:02,057 INFO L204 MainTranslator]: Completed translation [2024-11-08 14:03:02,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02 WrapperNode [2024-11-08 14:03:02,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 14:03:02,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 14:03:02,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 14:03:02,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 14:03:02,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,088 INFO L138 Inliner]: procedures = 18, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2024-11-08 14:03:02,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 14:03:02,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 14:03:02,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 14:03:02,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 14:03:02,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,099 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,107 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 2, 5, 5]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-11-08 14:03:02,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,113 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 14:03:02,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 14:03:02,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 14:03:02,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 14:03:02,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (1/1) ... [2024-11-08 14:03:02,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 14:03:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:02,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 14:03:02,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 14:03:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 14:03:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 14:03:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 14:03:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 14:03:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 14:03:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 14:03:02,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 14:03:02,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 14:03:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 14:03:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 14:03:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 14:03:02,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 14:03:02,286 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 14:03:02,290 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 14:03:02,464 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-08 14:03:02,464 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 14:03:02,475 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 14:03:02,475 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-08 14:03:02,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:03:02 BoogieIcfgContainer [2024-11-08 14:03:02,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 14:03:02,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 14:03:02,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 14:03:02,480 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 14:03:02,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 02:03:01" (1/3) ... [2024-11-08 14:03:02,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3d9540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:03:02, skipping insertion in model container [2024-11-08 14:03:02,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 02:03:02" (2/3) ... [2024-11-08 14:03:02,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3d9540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 02:03:02, skipping insertion in model container [2024-11-08 14:03:02,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 02:03:02" (3/3) ... [2024-11-08 14:03:02,482 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_array-2-2.i [2024-11-08 14:03:02,506 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 14:03:02,511 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 14:03:02,571 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 14:03:02,575 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;@42bc67ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 14:03:02,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 14:03:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 14:03:02,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:02,582 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:02,583 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:02,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -385982491, now seen corresponding path program 1 times [2024-11-08 14:03:02,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:02,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802066600] [2024-11-08 14:03:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:02,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:03:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:02,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802066600] [2024-11-08 14:03:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802066600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:03:02,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:03:02,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 14:03:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756114982] [2024-11-08 14:03:02,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:03:02,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 14:03:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 14:03:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:03:02,772 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:02,783 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2024-11-08 14:03:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 14:03:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 14:03:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:02,789 INFO L225 Difference]: With dead ends: 45 [2024-11-08 14:03:02,789 INFO L226 Difference]: Without dead ends: 22 [2024-11-08 14:03:02,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 14:03:02,793 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:02,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 14:03:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-08 14:03:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-08 14:03:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-08 14:03:02,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2024-11-08 14:03:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:02,816 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-08 14:03:02,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-08 14:03:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 14:03:02,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:02,817 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:02,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 14:03:02,818 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:02,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:02,818 INFO L85 PathProgramCache]: Analyzing trace with hash -391523617, now seen corresponding path program 1 times [2024-11-08 14:03:02,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:02,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389858721] [2024-11-08 14:03:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:03:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389858721] [2024-11-08 14:03:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389858721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 14:03:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 14:03:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 14:03:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93633330] [2024-11-08 14:03:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 14:03:03,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 14:03:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 14:03:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 14:03:03,014 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:03,113 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 14:03:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 14:03:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 14:03:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:03,114 INFO L225 Difference]: With dead ends: 58 [2024-11-08 14:03:03,114 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 14:03:03,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 14:03:03,115 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:03,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:03:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 14:03:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2024-11-08 14:03:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-08 14:03:03,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2024-11-08 14:03:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:03,121 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-08 14:03:03,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-08 14:03:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 14:03:03,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:03,122 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:03,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 14:03:03,122 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:03,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1083884881, now seen corresponding path program 1 times [2024-11-08 14:03:03,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704086473] [2024-11-08 14:03:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:03:04,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:04,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704086473] [2024-11-08 14:03:04,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704086473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:04,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255493932] [2024-11-08 14:03:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:04,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:04,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:04,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:04,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 14:03:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:04,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 14:03:04,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:03:04,315 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 21 treesize of output 17 [2024-11-08 14:03:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:03:04,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:03:04,585 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-08 14:03:04,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 38 [2024-11-08 14:03:04,599 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 48 treesize of output 44 [2024-11-08 14:03:04,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:03:04,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-08 14:03:04,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:03:04,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-08 14:03:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:03:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255493932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:03:04,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:03:04,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2024-11-08 14:03:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082642134] [2024-11-08 14:03:04,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:03:04,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 14:03:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 14:03:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-11-08 14:03:04,668 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:04,808 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-11-08 14:03:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 14:03:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 14:03:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:04,809 INFO L225 Difference]: With dead ends: 38 [2024-11-08 14:03:04,809 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 14:03:04,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-08 14:03:04,811 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:04,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:03:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 14:03:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2024-11-08 14:03:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-08 14:03:04,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2024-11-08 14:03:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:04,815 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-08 14:03:04,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-08 14:03:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 14:03:04,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:04,816 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:04,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 14:03:05,016 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 [2024-11-08 14:03:05,017 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:05,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash -924768315, now seen corresponding path program 1 times [2024-11-08 14:03:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468740761] [2024-11-08 14:03:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:03:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468740761] [2024-11-08 14:03:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468740761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:05,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156788639] [2024-11-08 14:03:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:05,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:05,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:05,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 14:03:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:05,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 14:03:05,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:03:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:03:05,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:03:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 14:03:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156788639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:03:05,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:03:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-08 14:03:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282904160] [2024-11-08 14:03:05,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:03:05,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 14:03:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 14:03:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:03:05,498 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:05,644 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-11-08 14:03:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 14:03:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 14:03:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:05,646 INFO L225 Difference]: With dead ends: 85 [2024-11-08 14:03:05,646 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 14:03:05,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-08 14:03:05,647 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:05,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 14:03:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 14:03:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2024-11-08 14:03:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-08 14:03:05,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2024-11-08 14:03:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:05,655 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-08 14:03:05,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-08 14:03:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 14:03:05,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:05,657 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:05,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 14:03:05,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 14:03:05,858 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:05,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 279637269, now seen corresponding path program 2 times [2024-11-08 14:03:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829765988] [2024-11-08 14:03:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:05,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:03:07,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:07,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829765988] [2024-11-08 14:03:07,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829765988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015864060] [2024-11-08 14:03:07,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:03:07,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:07,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:07,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:07,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 14:03:07,848 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:03:07,848 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:03:07,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 14:03:07,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:03:07,938 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 19 treesize of output 1 [2024-11-08 14:03:07,965 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 27 treesize of output 23 [2024-11-08 14:03:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:03:08,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:03:08,418 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-08 14:03:08,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-08 14:03:08,430 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 48 treesize of output 44 [2024-11-08 14:03:08,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:03:08,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-08 14:03:08,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 12 [2024-11-08 14:03:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 14:03:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015864060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:03:08,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:03:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 27 [2024-11-08 14:03:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916519953] [2024-11-08 14:03:08,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:03:08,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 14:03:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 14:03:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-08 14:03:08,515 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:08,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:08,884 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-11-08 14:03:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 14:03:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 14:03:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:08,885 INFO L225 Difference]: With dead ends: 52 [2024-11-08 14:03:08,885 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 14:03:08,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-11-08 14:03:08,886 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:08,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 122 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:03:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 14:03:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-11-08 14:03:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-11-08 14:03:08,891 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2024-11-08 14:03:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:08,892 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-11-08 14:03:08,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-11-08 14:03:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 14:03:08,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:08,892 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:08,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 14:03:09,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:09,093 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:09,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1046792405, now seen corresponding path program 3 times [2024-11-08 14:03:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641301866] [2024-11-08 14:03:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 14:03:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641301866] [2024-11-08 14:03:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641301866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067183591] [2024-11-08 14:03:09,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:03:09,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:09,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:09,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 14:03:09,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 14:03:09,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:03:09,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 14:03:09,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:03:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 14:03:09,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:03:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 14:03:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067183591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:03:09,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:03:09,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-11-08 14:03:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355449039] [2024-11-08 14:03:09,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:03:09,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 14:03:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 14:03:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:03:09,675 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:09,924 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-08 14:03:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 14:03:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 14:03:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:09,925 INFO L225 Difference]: With dead ends: 115 [2024-11-08 14:03:09,925 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 14:03:09,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-08 14:03:09,926 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:09,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 174 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 14:03:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 14:03:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2024-11-08 14:03:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-11-08 14:03:09,937 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 40 [2024-11-08 14:03:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:09,938 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-11-08 14:03:09,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-11-08 14:03:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 14:03:09,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:09,939 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:09,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 14:03:10,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:10,140 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:10,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:10,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1454597637, now seen corresponding path program 4 times [2024-11-08 14:03:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875510492] [2024-11-08 14:03:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 14:03:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:11,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875510492] [2024-11-08 14:03:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875510492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142908398] [2024-11-08 14:03:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 14:03:11,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:11,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:11,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 14:03:11,771 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 14:03:11,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:03:11,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 14:03:11,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:03:11,885 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 27 treesize of output 23 [2024-11-08 14:03:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:03:12,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:03:12,312 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-08 14:03:12,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 46 [2024-11-08 14:03:12,324 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 44 treesize of output 40 [2024-11-08 14:03:12,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:03:12,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-08 14:03:12,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:03:12,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2024-11-08 14:03:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-08 14:03:12,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142908398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:03:12,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:03:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 10] total 32 [2024-11-08 14:03:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399234973] [2024-11-08 14:03:12,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:03:12,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 14:03:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:03:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 14:03:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2024-11-08 14:03:12,421 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:03:12,827 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2024-11-08 14:03:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 14:03:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-08 14:03:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:03:12,828 INFO L225 Difference]: With dead ends: 66 [2024-11-08 14:03:12,828 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 14:03:12,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 14:03:12,829 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:03:12,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 210 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:03:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 14:03:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-08 14:03:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-08 14:03:12,836 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 50 [2024-11-08 14:03:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:03:12,837 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-08 14:03:12,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:03:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-08 14:03:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 14:03:12,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:03:12,837 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:03:12,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 14:03:13,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:13,040 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:03:13,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:03:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1506803439, now seen corresponding path program 5 times [2024-11-08 14:03:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:03:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164215199] [2024-11-08 14:03:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:03:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:03:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:03:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:03:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:03:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164215199] [2024-11-08 14:03:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164215199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:03:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703039077] [2024-11-08 14:03:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 14:03:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:03:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:03:13,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:03:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 14:04:08,875 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 14:04:08,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:04:08,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 14:04:08,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:04:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:04:09,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:04:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:04:09,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703039077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:04:09,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:04:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-11-08 14:04:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599328710] [2024-11-08 14:04:09,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:04:09,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 14:04:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:04:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 14:04:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-08 14:04:09,238 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:04:09,561 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2024-11-08 14:04:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 14:04:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-08 14:04:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:04:09,562 INFO L225 Difference]: With dead ends: 145 [2024-11-08 14:04:09,562 INFO L226 Difference]: Without dead ends: 80 [2024-11-08 14:04:09,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-08 14:04:09,563 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 105 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:04:09,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 242 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:04:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-08 14:04:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2024-11-08 14:04:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-11-08 14:04:09,572 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 54 [2024-11-08 14:04:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:04:09,572 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-11-08 14:04:09,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-11-08 14:04:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 14:04:09,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:04:09,574 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:04:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 14:04:09,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:09,775 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:04:09,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:04:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash 566903137, now seen corresponding path program 6 times [2024-11-08 14:04:09,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:04:09,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468045678] [2024-11-08 14:04:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:04:09,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:04:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:04:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 14:04:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:04:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468045678] [2024-11-08 14:04:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468045678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:04:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774290699] [2024-11-08 14:04:11,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 14:04:11,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:04:11,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:04:11,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 14:04:11,720 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 14:04:11,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:04:11,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 14:04:11,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:04:12,066 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 [2024-11-08 14:04:12,144 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 23 treesize of output 19 [2024-11-08 14:04:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 14:04:12,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:04:13,112 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-08 14:04:13,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 46 [2024-11-08 14:04:13,120 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 44 treesize of output 40 [2024-11-08 14:04:13,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:04:13,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-08 14:04:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-08 14:04:13,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774290699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:04:13,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:04:13,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2024-11-08 14:04:13,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122620407] [2024-11-08 14:04:13,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:04:13,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 14:04:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:04:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 14:04:13,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 14:04:13,311 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:04:14,478 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2024-11-08 14:04:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 14:04:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-08 14:04:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:04:14,479 INFO L225 Difference]: With dead ends: 96 [2024-11-08 14:04:14,479 INFO L226 Difference]: Without dead ends: 94 [2024-11-08 14:04:14,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=516, Invalid=3644, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 14:04:14,481 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 14:04:14,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 296 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 14:04:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-08 14:04:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2024-11-08 14:04:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-11-08 14:04:14,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 64 [2024-11-08 14:04:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:04:14,487 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-11-08 14:04:14,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-11-08 14:04:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-08 14:04:14,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:04:14,488 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:04:14,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 14:04:14,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:14,689 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:04:14,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:04:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash -820017801, now seen corresponding path program 7 times [2024-11-08 14:04:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:04:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435636386] [2024-11-08 14:04:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:04:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:04:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:04:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 14:04:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:04:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435636386] [2024-11-08 14:04:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435636386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:04:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340690308] [2024-11-08 14:04:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 14:04:15,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:04:15,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:04:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 14:04:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:04:15,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 14:04:15,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:04:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 14:04:15,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:04:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-08 14:04:15,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340690308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:04:15,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:04:15,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2024-11-08 14:04:15,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928778433] [2024-11-08 14:04:15,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:04:15,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 14:04:15,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:04:15,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 14:04:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-11-08 14:04:15,592 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:04:15,915 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2024-11-08 14:04:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 14:04:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-08 14:04:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:04:15,916 INFO L225 Difference]: With dead ends: 175 [2024-11-08 14:04:15,916 INFO L226 Difference]: Without dead ends: 94 [2024-11-08 14:04:15,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-11-08 14:04:15,917 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 185 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 14:04:15,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 334 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 14:04:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-08 14:04:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2024-11-08 14:04:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2024-11-08 14:04:15,928 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 68 [2024-11-08 14:04:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:04:15,928 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2024-11-08 14:04:15,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2024-11-08 14:04:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-08 14:04:15,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:04:15,931 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:04:15,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 14:04:16,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 14:04:16,132 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:04:16,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:04:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -808721593, now seen corresponding path program 8 times [2024-11-08 14:04:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:04:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778038954] [2024-11-08 14:04:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:04:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:04:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:04:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 14:04:18,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:04:18,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778038954] [2024-11-08 14:04:18,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778038954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:04:18,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426184137] [2024-11-08 14:04:18,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 14:04:18,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:18,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:04:18,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:04:18,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 14:04:18,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 14:04:18,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 14:04:18,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-08 14:04:18,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 14:04:18,712 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 19 treesize of output 1 [2024-11-08 14:04:18,794 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 27 treesize of output 23 [2024-11-08 14:04:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 14:04:19,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 14:04:19,624 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-08 14:04:19,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-08 14:04:19,632 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 44 treesize of output 40 [2024-11-08 14:04:19,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 14:04:19,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-08 14:04:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-08 14:04:19,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426184137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 14:04:19,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 14:04:19,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 44 [2024-11-08 14:04:19,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423311343] [2024-11-08 14:04:19,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 14:04:19,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-08 14:04:19,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 14:04:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-08 14:04:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 14:04:19,793 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 14:04:20,562 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-11-08 14:04:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 14:04:20,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-08 14:04:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 14:04:20,563 INFO L225 Difference]: With dead ends: 94 [2024-11-08 14:04:20,563 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 14:04:20,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 14:04:20,564 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 14:04:20,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 357 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 14:04:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 14:04:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2024-11-08 14:04:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2024-11-08 14:04:20,575 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2024-11-08 14:04:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 14:04:20,576 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2024-11-08 14:04:20,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 14:04:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2024-11-08 14:04:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-08 14:04:20,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 14:04:20,579 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 14:04:20,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 14:04:20,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:20,780 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 14:04:20,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 14:04:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2115093597, now seen corresponding path program 9 times [2024-11-08 14:04:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 14:04:20,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335794248] [2024-11-08 14:04:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 14:04:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 14:04:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 14:04:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 107 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 14:04:21,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 14:04:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335794248] [2024-11-08 14:04:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335794248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 14:04:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443910661] [2024-11-08 14:04:21,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 14:04:21,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 14:04:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 14:04:21,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 14:04:21,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process