/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/mbpr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:08:18,755 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:08:18,831 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:08:18,835 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:08:18,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:08:18,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:08:18,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:08:18,864 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:08:18,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:08:18,868 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:08:18,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:08:18,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:08:18,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:08:18,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:08:18,870 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:08:18,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:08:18,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:08:18,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:08:18,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:08:18,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:08:18,872 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:08:18,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:08:18,872 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:08:18,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:08:18,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:08:18,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:08:18,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:08:18,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:08:18,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:08:18,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:08:18,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:08:18,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:08:18,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:08:19,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:08:19,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:08:19,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:08:19,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:08:19,128 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:08:19,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2023-12-16 00:08:20,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:08:20,375 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:08:20,376 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c [2023-12-16 00:08:20,380 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0765d65d/1e93de14abab4ef0b7e228fe55aee335/FLAG80516caee [2023-12-16 00:08:20,390 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0765d65d/1e93de14abab4ef0b7e228fe55aee335 [2023-12-16 00:08:20,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:08:20,392 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:08:20,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:08:20,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:08:20,396 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:08:20,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aba670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20, skipping insertion in model container [2023-12-16 00:08:20,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,411 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:08:20,518 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-12-16 00:08:20,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:08:20,547 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:08:20,556 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-12-16 00:08:20,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:08:20,576 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:08:20,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20 WrapperNode [2023-12-16 00:08:20,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:08:20,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:08:20,578 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:08:20,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:08:20,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,604 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-12-16 00:08:20,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:08:20,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:08:20,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:08:20,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:08:20,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,627 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,644 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 6 writes are split as follows [0, 0, 6]. [2023-12-16 00:08:20,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,654 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,656 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,658 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:08:20,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:08:20,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:08:20,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:08:20,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (1/1) ... [2023-12-16 00:08:20,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:08:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:20,730 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) [2023-12-16 00:08:20,767 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 [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 00:08:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:08:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:08:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 00:08:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:08:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:08:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:08:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:08:20,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 00:08:20,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 00:08:20,827 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:08:20,829 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:08:20,959 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:08:20,978 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:08:20,978 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 00:08:20,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:08:20 BoogieIcfgContainer [2023-12-16 00:08:20,979 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:08:20,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:08:20,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:08:20,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:08:20,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:08:20" (1/3) ... [2023-12-16 00:08:20,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8ad4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:08:20, skipping insertion in model container [2023-12-16 00:08:20,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:08:20" (2/3) ... [2023-12-16 00:08:20,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a8ad4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:08:20, skipping insertion in model container [2023-12-16 00:08:20,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:08:20" (3/3) ... [2023-12-16 00:08:20,993 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2023-12-16 00:08:21,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:08:21,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:08:21,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:08:21,041 INFO L357 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, mHoare=true, 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;@25bccf08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:08:21,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:08:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 00:08:21,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:21,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:21,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:21,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -951462663, now seen corresponding path program 1 times [2023-12-16 00:08:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:21,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594756416] [2023-12-16 00:08:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:21,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594756416] [2023-12-16 00:08:21,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594756416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:08:21,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:08:21,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:08:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344629289] [2023-12-16 00:08:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:08:21,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 00:08:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 00:08:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:08:21,235 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:21,255 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2023-12-16 00:08:21,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 00:08:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-16 00:08:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:21,269 INFO L225 Difference]: With dead ends: 44 [2023-12-16 00:08:21,269 INFO L226 Difference]: Without dead ends: 20 [2023-12-16 00:08:21,272 INFO L412 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 [2023-12-16 00:08:21,274 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:08:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-16 00:08:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-16 00:08:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2023-12-16 00:08:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-12-16 00:08:21,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2023-12-16 00:08:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:21,296 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-12-16 00:08:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-12-16 00:08:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 00:08:21,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:21,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 00:08:21,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:21,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1175939807, now seen corresponding path program 1 times [2023-12-16 00:08:21,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:21,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75261414] [2023-12-16 00:08:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:21,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:21,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:21,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75261414] [2023-12-16 00:08:21,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75261414] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:08:21,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:08:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:08:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816131872] [2023-12-16 00:08:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:08:21,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:08:21,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:08:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:08:21,533 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:21,582 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-12-16 00:08:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:08:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-16 00:08:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:21,584 INFO L225 Difference]: With dead ends: 25 [2023-12-16 00:08:21,584 INFO L226 Difference]: Without dead ends: 23 [2023-12-16 00:08:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:08:21,585 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:21,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:08:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-16 00:08:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-16 00:08:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2023-12-16 00:08:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-16 00:08:21,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-12-16 00:08:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:21,594 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-16 00:08:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-16 00:08:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 00:08:21,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:21,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:21,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 00:08:21,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1175880225, now seen corresponding path program 1 times [2023-12-16 00:08:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063917466] [2023-12-16 00:08:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063917466] [2023-12-16 00:08:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063917466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:08:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:08:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:08:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491842048] [2023-12-16 00:08:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:08:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:08:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:08:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:08:21,803 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:21,851 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-12-16 00:08:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:08:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-16 00:08:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:21,852 INFO L225 Difference]: With dead ends: 42 [2023-12-16 00:08:21,853 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 00:08:21,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:08:21,854 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:21,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:08:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 00:08:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-12-16 00:08:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-12-16 00:08:21,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2023-12-16 00:08:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:21,858 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-12-16 00:08:21,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-12-16 00:08:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-16 00:08:21,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:21,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:21,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 00:08:21,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:21,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529468, now seen corresponding path program 1 times [2023-12-16 00:08:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:21,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346119717] [2023-12-16 00:08:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:21,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346119717] [2023-12-16 00:08:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346119717] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:08:21,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:08:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:08:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926463094] [2023-12-16 00:08:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:08:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:08:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:08:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:08:21,958 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:21,979 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-12-16 00:08:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:08:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-16 00:08:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:21,980 INFO L225 Difference]: With dead ends: 37 [2023-12-16 00:08:21,980 INFO L226 Difference]: Without dead ends: 24 [2023-12-16 00:08:21,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:08:21,984 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:21,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:08:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-16 00:08:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-16 00:08:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2023-12-16 00:08:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-16 00:08:21,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2023-12-16 00:08:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:21,989 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-16 00:08:21,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-16 00:08:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-16 00:08:21,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:21,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:21,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-16 00:08:21,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1657379458, now seen corresponding path program 1 times [2023-12-16 00:08:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:21,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746038108] [2023-12-16 00:08:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:21,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:22,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746038108] [2023-12-16 00:08:22,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746038108] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:22,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774913904] [2023-12-16 00:08:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:22,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:22,403 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) [2023-12-16 00:08:22,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:08:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:22,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-16 00:08:22,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:22,543 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 [2023-12-16 00:08:22,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:08:22,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:08:22,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-16 00:08:22,707 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-16 00:08:22,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 36 [2023-12-16 00:08:22,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:08:22,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-12-16 00:08:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:22,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:22,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:08:22,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-16 00:08:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:23,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774913904] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:23,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:23,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 7] total 21 [2023-12-16 00:08:23,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082126279] [2023-12-16 00:08:23,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 00:08:23,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 00:08:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-12-16 00:08:23,005 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 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) [2023-12-16 00:08:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:23,298 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-12-16 00:08:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 00:08:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 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 20 [2023-12-16 00:08:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:23,300 INFO L225 Difference]: With dead ends: 62 [2023-12-16 00:08:23,300 INFO L226 Difference]: Without dead ends: 44 [2023-12-16 00:08:23,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2023-12-16 00:08:23,302 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:23,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 78 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:08:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-16 00:08:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2023-12-16 00:08:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-16 00:08:23,312 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-12-16 00:08:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:23,312 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-16 00:08:23,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 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) [2023-12-16 00:08:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-16 00:08:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 00:08:23,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:23,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:23,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 00:08:23,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:23,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:23,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1879775925, now seen corresponding path program 1 times [2023-12-16 00:08:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458813950] [2023-12-16 00:08:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458813950] [2023-12-16 00:08:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458813950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82950852] [2023-12-16 00:08:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:23,805 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) [2023-12-16 00:08:23,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:08:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:23,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-16 00:08:23,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:23,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:08:23,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:08:23,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:08:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:23,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:23,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:08:23,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-16 00:08:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:23,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82950852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:23,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:23,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-12-16 00:08:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233320472] [2023-12-16 00:08:23,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:23,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-16 00:08:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-16 00:08:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-12-16 00:08:23,991 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-12-16 00:08:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:24,140 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-12-16 00:08:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 00:08:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-16 00:08:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:24,141 INFO L225 Difference]: With dead ends: 43 [2023-12-16 00:08:24,141 INFO L226 Difference]: Without dead ends: 41 [2023-12-16 00:08:24,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-12-16 00:08:24,142 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:24,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 72 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:08:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-16 00:08:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2023-12-16 00:08:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:08:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-16 00:08:24,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2023-12-16 00:08:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:24,146 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-16 00:08:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-12-16 00:08:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-16 00:08:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-16 00:08:24,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:24,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:24,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:08:24,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-16 00:08:24,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:24,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:24,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2092568542, now seen corresponding path program 2 times [2023-12-16 00:08:24,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:24,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723618792] [2023-12-16 00:08:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723618792] [2023-12-16 00:08:24,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723618792] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532387965] [2023-12-16 00:08:24,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:08:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:24,590 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) [2023-12-16 00:08:24,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:08:24,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:08:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:08:24,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-16 00:08:24,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:24,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532387965] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:25,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-12-16 00:08:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925709961] [2023-12-16 00:08:25,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-16 00:08:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-16 00:08:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-12-16 00:08:25,009 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 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) [2023-12-16 00:08:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:25,168 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2023-12-16 00:08:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-16 00:08:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 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 30 [2023-12-16 00:08:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:25,170 INFO L225 Difference]: With dead ends: 81 [2023-12-16 00:08:25,171 INFO L226 Difference]: Without dead ends: 44 [2023-12-16 00:08:25,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2023-12-16 00:08:25,172 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 219 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:25,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:08:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-16 00:08:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-12-16 00:08:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 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) [2023-12-16 00:08:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-12-16 00:08:25,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2023-12-16 00:08:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:25,180 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-12-16 00:08:25,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 states have internal predecessors, (80), 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) [2023-12-16 00:08:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-12-16 00:08:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-16 00:08:25,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:25,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:25,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 00:08:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:25,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:25,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:25,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1602392481, now seen corresponding path program 3 times [2023-12-16 00:08:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:25,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841912513] [2023-12-16 00:08:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:25,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:08:25,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841912513] [2023-12-16 00:08:25,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841912513] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713988991] [2023-12-16 00:08:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:08:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:25,848 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) [2023-12-16 00:08:25,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:08:25,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-16 00:08:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:08:25,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-16 00:08:25,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:26,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:08:26,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:08:26,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:08:26,162 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-16 00:08:26,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-12-16 00:08:26,201 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-16 00:08:26,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-12-16 00:08:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:08:26,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:26,759 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 50 treesize of output 46 [2023-12-16 00:08:26,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-16 00:08:26,795 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 [2023-12-16 00:08:26,799 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 [2023-12-16 00:08:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-16 00:08:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713988991] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:26,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 32 [2023-12-16 00:08:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79245353] [2023-12-16 00:08:26,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-16 00:08:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-16 00:08:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-12-16 00:08:26,848 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2023-12-16 00:08:30,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:35,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:38,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:43,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:46,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:51,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:55,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 00:08:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:55,853 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2023-12-16 00:08:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-16 00:08:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 [2023-12-16 00:08:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:55,854 INFO L225 Difference]: With dead ends: 73 [2023-12-16 00:08:55,854 INFO L226 Difference]: Without dead ends: 64 [2023-12-16 00:08:55,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=637, Invalid=2328, Unknown=5, NotChecked=0, Total=2970 [2023-12-16 00:08:55,857 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 52 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:55,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 129 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 499 Invalid, 13 Unknown, 0 Unchecked, 25.5s Time] [2023-12-16 00:08:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-16 00:08:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2023-12-16 00:08:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 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) [2023-12-16 00:08:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-12-16 00:08:55,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2023-12-16 00:08:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:55,863 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-12-16 00:08:55,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2023-12-16 00:08:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-12-16 00:08:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-16 00:08:55,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:55,864 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:55,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-16 00:08:56,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:56,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:56,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1268189618, now seen corresponding path program 4 times [2023-12-16 00:08:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:56,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624174388] [2023-12-16 00:08:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:56,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:08:56,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624174388] [2023-12-16 00:08:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624174388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446409123] [2023-12-16 00:08:56,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:08:56,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:56,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:56,516 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) [2023-12-16 00:08:56,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:08:56,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:08:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:08:56,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-16 00:08:56,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:56,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 00:08:56,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:08:56,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-12-16 00:08:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:08:56,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:56,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:08:56,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-16 00:08:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:08:56,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446409123] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:56,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:56,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 33 [2023-12-16 00:08:56,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263149046] [2023-12-16 00:08:56,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:56,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-16 00:08:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-16 00:08:56,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-12-16 00:08:56,901 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2023-12-16 00:08:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:57,751 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2023-12-16 00:08:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-16 00:08:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 41 [2023-12-16 00:08:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:57,752 INFO L225 Difference]: With dead ends: 137 [2023-12-16 00:08:57,752 INFO L226 Difference]: Without dead ends: 112 [2023-12-16 00:08:57,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=636, Invalid=3786, Unknown=0, NotChecked=0, Total=4422 [2023-12-16 00:08:57,754 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 176 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:57,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 155 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 00:08:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-16 00:08:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2023-12-16 00:08:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 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) [2023-12-16 00:08:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-12-16 00:08:57,762 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 41 [2023-12-16 00:08:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:57,762 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-12-16 00:08:57,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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) [2023-12-16 00:08:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-12-16 00:08:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-16 00:08:57,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:57,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:57,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-16 00:08:57,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:57,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:57,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash -248711423, now seen corresponding path program 5 times [2023-12-16 00:08:57,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916965350] [2023-12-16 00:08:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:57,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:08:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:08:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:08:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916965350] [2023-12-16 00:08:58,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916965350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:08:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189213774] [2023-12-16 00:08:58,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:08:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:08:58,260 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) [2023-12-16 00:08:58,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:08:58,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-16 00:08:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:08:58,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:08:58,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:08:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:08:58,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:08:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:08:58,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189213774] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:08:58,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:08:58,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-12-16 00:08:58,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562188238] [2023-12-16 00:08:58,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:08:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-16 00:08:58,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:08:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-16 00:08:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-12-16 00:08:58,961 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2023-12-16 00:08:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:08:59,360 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-12-16 00:08:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-16 00:08:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 46 [2023-12-16 00:08:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:08:59,362 INFO L225 Difference]: With dead ends: 97 [2023-12-16 00:08:59,362 INFO L226 Difference]: Without dead ends: 57 [2023-12-16 00:08:59,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2023-12-16 00:08:59,363 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 203 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:08:59,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 115 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:08:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-16 00:08:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-12-16 00:08:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 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) [2023-12-16 00:08:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-16 00:08:59,376 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2023-12-16 00:08:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:08:59,376 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-16 00:08:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2023-12-16 00:08:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-16 00:08:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-16 00:08:59,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:08:59,378 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:08:59,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:08:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:08:59,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:08:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:08:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1683612192, now seen corresponding path program 6 times [2023-12-16 00:08:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:08:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094510611] [2023-12-16 00:08:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:08:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:08:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:09:00,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:00,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094510611] [2023-12-16 00:09:00,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094510611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:00,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577341980] [2023-12-16 00:09:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:09:00,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:00,374 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) [2023-12-16 00:09:00,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:09:00,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-16 00:09:00,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:00,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-16 00:09:00,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:00,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:09:00,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:00,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:09:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:00,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-16 00:09:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:00,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:00,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-12-16 00:09:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-16 00:09:01,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:01,249 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 42 treesize of output 38 [2023-12-16 00:09:01,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-16 00:09:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-16 00:09:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577341980] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:01,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2023-12-16 00:09:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553656565] [2023-12-16 00:09:01,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-16 00:09:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-16 00:09:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2023-12-16 00:09:01,334 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 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) [2023-12-16 00:09:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:02,430 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-12-16 00:09:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-16 00:09:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 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 52 [2023-12-16 00:09:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:02,431 INFO L225 Difference]: With dead ends: 87 [2023-12-16 00:09:02,431 INFO L226 Difference]: Without dead ends: 78 [2023-12-16 00:09:02,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=660, Invalid=3762, Unknown=0, NotChecked=0, Total=4422 [2023-12-16 00:09:02,432 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 226 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:02,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 192 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 00:09:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-16 00:09:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2023-12-16 00:09:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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) [2023-12-16 00:09:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-12-16 00:09:02,438 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2023-12-16 00:09:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:02,439 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-12-16 00:09:02,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 36 states have internal predecessors, (123), 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) [2023-12-16 00:09:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-12-16 00:09:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-16 00:09:02,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:02,439 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:02,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:09:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:02,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:02,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2052791599, now seen corresponding path program 7 times [2023-12-16 00:09:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889624576] [2023-12-16 00:09:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:09:03,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:03,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889624576] [2023-12-16 00:09:03,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889624576] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:03,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092440276] [2023-12-16 00:09:03,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 00:09:03,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:03,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:03,308 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) [2023-12-16 00:09:03,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:09:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:03,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-16 00:09:03,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:03,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 00:09:03,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:03,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:09:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:09:03,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:03,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:09:03,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-16 00:09:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:09:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092440276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:03,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:03,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 34 [2023-12-16 00:09:03,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29270048] [2023-12-16 00:09:03,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-16 00:09:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-16 00:09:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2023-12-16 00:09:03,861 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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) [2023-12-16 00:09:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:05,049 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-12-16 00:09:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-16 00:09:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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 57 [2023-12-16 00:09:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:05,050 INFO L225 Difference]: With dead ends: 99 [2023-12-16 00:09:05,050 INFO L226 Difference]: Without dead ends: 97 [2023-12-16 00:09:05,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2023-12-16 00:09:05,051 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:05,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 218 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 00:09:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-16 00:09:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2023-12-16 00:09:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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) [2023-12-16 00:09:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-12-16 00:09:05,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 57 [2023-12-16 00:09:05,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:05,059 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-12-16 00:09:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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) [2023-12-16 00:09:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-12-16 00:09:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-16 00:09:05,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:05,061 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:05,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-16 00:09:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-16 00:09:05,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:05,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2009397570, now seen corresponding path program 8 times [2023-12-16 00:09:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:05,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643434847] [2023-12-16 00:09:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:05,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:09:05,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643434847] [2023-12-16 00:09:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643434847] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909180897] [2023-12-16 00:09:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:09:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:05,700 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) [2023-12-16 00:09:05,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-16 00:09:05,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:09:05,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:05,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-16 00:09:05,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:09:06,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:09:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909180897] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:06,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:06,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-12-16 00:09:06,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254975727] [2023-12-16 00:09:06,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:06,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-16 00:09:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-16 00:09:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2023-12-16 00:09:06,478 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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) [2023-12-16 00:09:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:06,799 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2023-12-16 00:09:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-16 00:09:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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 62 [2023-12-16 00:09:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:06,801 INFO L225 Difference]: With dead ends: 157 [2023-12-16 00:09:06,801 INFO L226 Difference]: Without dead ends: 73 [2023-12-16 00:09:06,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2023-12-16 00:09:06,802 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 216 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:06,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 185 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:09:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-16 00:09:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2023-12-16 00:09:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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) [2023-12-16 00:09:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-12-16 00:09:06,813 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 62 [2023-12-16 00:09:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:06,814 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-12-16 00:09:06,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 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) [2023-12-16 00:09:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-12-16 00:09:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-16 00:09:06,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:06,817 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:06,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-16 00:09:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-16 00:09:07,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:07,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -464658301, now seen corresponding path program 9 times [2023-12-16 00:09:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:07,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688494631] [2023-12-16 00:09:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:09:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688494631] [2023-12-16 00:09:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688494631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288512173] [2023-12-16 00:09:08,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:09:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:08,194 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) [2023-12-16 00:09:08,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-16 00:09:08,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-16 00:09:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:08,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-16 00:09:08,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:08,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 00:09:08,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:08,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-12-16 00:09:08,569 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-12-16 00:09:08,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2023-12-16 00:09:08,618 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-16 00:09:08,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 40 [2023-12-16 00:09:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:09:08,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:09,258 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 42 treesize of output 38 [2023-12-16 00:09:09,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-16 00:09:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:09:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288512173] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:09,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 16] total 52 [2023-12-16 00:09:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677066826] [2023-12-16 00:09:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:09,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-16 00:09:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-16 00:09:09,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2023-12-16 00:09:09,377 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 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) [2023-12-16 00:09:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:12,624 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-12-16 00:09:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-16 00:09:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 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 [2023-12-16 00:09:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:12,625 INFO L225 Difference]: With dead ends: 119 [2023-12-16 00:09:12,625 INFO L226 Difference]: Without dead ends: 110 [2023-12-16 00:09:12,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1076, Invalid=8234, Unknown=2, NotChecked=0, Total=9312 [2023-12-16 00:09:12,627 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 448 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:12,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 384 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-16 00:09:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-16 00:09:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2023-12-16 00:09:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:09:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-12-16 00:09:12,635 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2023-12-16 00:09:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:12,636 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-12-16 00:09:12,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.2884615384615383) internal successors, (171), 52 states have internal predecessors, (171), 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) [2023-12-16 00:09:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-12-16 00:09:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-16 00:09:12,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:12,638 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:12,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-16 00:09:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-16 00:09:12,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:12,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:12,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1347662322, now seen corresponding path program 10 times [2023-12-16 00:09:12,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:12,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430338544] [2023-12-16 00:09:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:12,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:09:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430338544] [2023-12-16 00:09:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430338544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156835329] [2023-12-16 00:09:13,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:09:13,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:13,598 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:09:13,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-16 00:09:13,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:09:13,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:13,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-16 00:09:13,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:13,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 00:09:13,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:13,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-12-16 00:09:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 00:09:13,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:14,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:09:14,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-16 00:09:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-16 00:09:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156835329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:14,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 38 [2023-12-16 00:09:14,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657788417] [2023-12-16 00:09:14,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:14,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-16 00:09:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-16 00:09:14,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2023-12-16 00:09:14,177 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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) [2023-12-16 00:09:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:16,156 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2023-12-16 00:09:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-12-16 00:09:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 73 [2023-12-16 00:09:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:16,157 INFO L225 Difference]: With dead ends: 157 [2023-12-16 00:09:16,157 INFO L226 Difference]: Without dead ends: 155 [2023-12-16 00:09:16,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1090, Invalid=9010, Unknown=0, NotChecked=0, Total=10100 [2023-12-16 00:09:16,160 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 337 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:16,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 240 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-16 00:09:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-16 00:09:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 79. [2023-12-16 00:09:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 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) [2023-12-16 00:09:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-12-16 00:09:16,180 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 73 [2023-12-16 00:09:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:16,181 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-12-16 00:09:16,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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) [2023-12-16 00:09:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-12-16 00:09:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-16 00:09:16,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:16,183 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:16,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-16 00:09:16,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-16 00:09:16,402 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:16,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2025851941, now seen corresponding path program 11 times [2023-12-16 00:09:16,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:16,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068619185] [2023-12-16 00:09:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:16,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-16 00:09:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:16,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068619185] [2023-12-16 00:09:16,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068619185] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:16,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909175528] [2023-12-16 00:09:16,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:09:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:16,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:09:16,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 00:09:17,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-16 00:09:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:17,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-16 00:09:17,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:17,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 00:09:17,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:17,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-12-16 00:09:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 141 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:09:17,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:18,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-16 00:09:18,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-16 00:09:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 141 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:09:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909175528] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:18,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:18,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2023-12-16 00:09:18,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428331183] [2023-12-16 00:09:18,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:18,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-16 00:09:18,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-16 00:09:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2023-12-16 00:09:18,195 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 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) [2023-12-16 00:09:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:09:20,172 INFO L93 Difference]: Finished difference Result 230 states and 249 transitions. [2023-12-16 00:09:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-16 00:09:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 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 [2023-12-16 00:09:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:09:20,173 INFO L225 Difference]: With dead ends: 230 [2023-12-16 00:09:20,173 INFO L226 Difference]: Without dead ends: 124 [2023-12-16 00:09:20,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1266, Invalid=9446, Unknown=0, NotChecked=0, Total=10712 [2023-12-16 00:09:20,176 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 583 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:20,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 576 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-16 00:09:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-16 00:09:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2023-12-16 00:09:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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) [2023-12-16 00:09:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2023-12-16 00:09:20,204 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2023-12-16 00:09:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:09:20,204 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2023-12-16 00:09:20,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 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) [2023-12-16 00:09:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2023-12-16 00:09:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-16 00:09:20,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:09:20,207 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:09:20,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 00:09:20,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-16 00:09:20,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:09:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:09:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2129772614, now seen corresponding path program 12 times [2023-12-16 00:09:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:09:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604674512] [2023-12-16 00:09:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:09:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:09:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:09:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:09:21,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:09:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604674512] [2023-12-16 00:09:21,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604674512] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:09:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606082354] [2023-12-16 00:09:21,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:09:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:09:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:09:21,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:09:21,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-16 00:09:22,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-16 00:09:22,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:09:22,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-16 00:09:22,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:09:22,610 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 [2023-12-16 00:09:22,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:22,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-12-16 00:09:22,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-16 00:09:22,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:22,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:09:22,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-12-16 00:09:22,894 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-16 00:09:22,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2023-12-16 00:09:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:22,950 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-16 00:09:22,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2023-12-16 00:09:23,063 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-12-16 00:09:23,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 50 [2023-12-16 00:09:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:23,148 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-16 00:09:23,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 64 [2023-12-16 00:09:23,251 INFO L349 Elim1Store]: treesize reduction 84, result has 28.8 percent of original size [2023-12-16 00:09:23,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 64 [2023-12-16 00:09:23,369 INFO L349 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2023-12-16 00:09:23,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 75 treesize of output 78 [2023-12-16 00:09:23,604 INFO L349 Elim1Store]: treesize reduction 114, result has 23.0 percent of original size [2023-12-16 00:09:23,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 67 treesize of output 78 [2023-12-16 00:09:23,723 INFO L349 Elim1Store]: treesize reduction 103, result has 6.4 percent of original size [2023-12-16 00:09:23,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 86 treesize of output 92 [2023-12-16 00:09:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 00:09:25,297 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-16 00:09:25,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 22 [2023-12-16 00:09:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:09:25,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:09:26,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-12-16 00:09:26,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-16 00:09:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 211 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-16 00:09:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606082354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:09:27,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:09:27,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 36, 25] total 83 [2023-12-16 00:09:27,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206215527] [2023-12-16 00:09:27,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:09:27,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-16 00:09:27,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:09:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-16 00:09:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=6250, Unknown=0, NotChecked=0, Total=6806 [2023-12-16 00:09:27,205 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 83 states, 83 states have (on average 2.8313253012048194) internal successors, (235), 83 states have internal predecessors, (235), 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) Received shutdown request... [2023-12-16 00:09:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 00:09:27,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3695 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=618, Invalid=7214, Unknown=0, NotChecked=0, Total=7832 [2023-12-16 00:09:27,582 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:09:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:09:27,583 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 00:09:27,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-16 00:09:27,596 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:09:27,621 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:09:27,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-16 00:09:27,783 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (85states) and FLOYD_HOARE automaton (currently 8 states, 83 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. [2023-12-16 00:09:27,787 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1, 1, 1] [2023-12-16 00:09:27,788 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:09:27,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:09:27 BoogieIcfgContainer [2023-12-16 00:09:27,789 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:09:27,789 INFO L158 Benchmark]: Toolchain (without parser) took 67397.32ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 185.0MB in the beginning and 201.8MB in the end (delta: -16.8MB). Peak memory consumption was 158.9MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.88ms. Allocated memory is still 238.0MB. Free memory was 184.6MB in the beginning and 172.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.40ms. Allocated memory is still 238.0MB. Free memory was 172.5MB in the beginning and 170.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: Boogie Preprocessor took 55.09ms. Allocated memory is still 238.0MB. Free memory was 170.9MB in the beginning and 168.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: RCFGBuilder took 315.60ms. Allocated memory is still 238.0MB. Free memory was 168.8MB in the beginning and 154.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,790 INFO L158 Benchmark]: TraceAbstraction took 66808.84ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 153.6MB in the beginning and 201.8MB in the end (delta: -48.2MB). Peak memory consumption was 127.4MB. Max. memory is 8.0GB. [2023-12-16 00:09:27,791 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.88ms. Allocated memory is still 238.0MB. Free memory was 184.6MB in the beginning and 172.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.40ms. Allocated memory is still 238.0MB. Free memory was 172.5MB in the beginning and 170.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 55.09ms. Allocated memory is still 238.0MB. Free memory was 170.9MB in the beginning and 168.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 315.60ms. Allocated memory is still 238.0MB. Free memory was 168.8MB in the beginning and 154.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 66808.84ms. Allocated memory was 238.0MB in the beginning and 413.1MB in the end (delta: 175.1MB). Free memory was 153.6MB in the beginning and 201.8MB in the end (delta: -48.2MB). Peak memory consumption was 127.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was constructing difference of abstraction (85states) and FLOYD_HOARE automaton (currently 8 states, 83 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.8s, OverallIterations: 17, TraceHistogramMax: 9, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 41.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 3115 SdHoareTripleChecker+Valid, 29.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3115 mSDsluCounter, 2598 SdHoareTripleChecker+Invalid, 29.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2311 mSDsCounter, 866 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9296 IncrementalHoareTripleChecker+Invalid, 10175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 866 mSolverCounterUnsat, 287 mSDtfsCounter, 9296 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1915 GetRequests, 1075 SyntacticMatches, 32 SemanticMatches, 807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18258 ImplicationChecksByTransitivity, 19.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=16, InterpolantAutomatonStates: 419, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 329 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 1406 NumberOfCodeBlocks, 1402 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2035 ConstructedInterpolants, 117 QuantifiedInterpolants, 26753 SizeOfPredicates, 122 NumberOfNonLiveVariables, 2601 ConjunctsInSsa, 394 ConjunctsInUnsatCore, 43 InterpolantComputations, 4 PerfectInterpolantSequences, 1169/3614 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown