/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-tiling/mbpr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:22:51,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:22:51,586 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:22:51,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:22:51,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:22:51,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:22:51,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:22:51,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:22:51,621 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:22:51,624 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:22:51,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:22:51,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:22:51,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:22:51,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:22:51,626 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:22:51,626 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:22:51,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:22:51,627 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:22:51,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:22:51,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:22:51,627 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:22:51,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:22:51,629 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:22:51,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:22:51,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:22:51,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:22:51,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:22:51,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:22:51,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:22:51,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:22:51,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:22:51,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:22:51,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:22:51,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:22:51,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:22:51,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:22:51,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:22:51,835 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:22:51,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr4.c [2023-12-18 18:22:52,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:22:52,980 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:22:52,980 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr4.c [2023-12-18 18:22:52,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5422da5df/6ebf83cbcf57459aa441b276e4450644/FLAG552e6c4c0 [2023-12-18 18:22:52,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5422da5df/6ebf83cbcf57459aa441b276e4450644 [2023-12-18 18:22:52,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:22:52,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:22:52,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:22:52,997 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:22:52,999 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:22:53,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:22:52" (1/1) ... [2023-12-18 18:22:53,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb408e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53, skipping insertion in model container [2023-12-18 18:22:53,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:22:52" (1/1) ... [2023-12-18 18:22:53,020 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:22:53,120 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/mbpr4.c[396,409] [2023-12-18 18:22:53,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:22:53,153 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:22:53,165 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/mbpr4.c[396,409] [2023-12-18 18:22:53,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:22:53,199 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:22:53,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53 WrapperNode [2023-12-18 18:22:53,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:22:53,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:22:53,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:22:53,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:22:53,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,221 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,239 INFO L138 Inliner]: procedures = 15, calls = 54, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 146 [2023-12-18 18:22:53,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:22:53,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:22:53,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:22:53,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:22:53,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,250 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,258 INFO L175 MemorySlicer]: Split 44 memory accesses to 3 slices as follows [2, 8, 34]. 77 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 20 writes are split as follows [0, 0, 20]. [2023-12-18 18:22:53,258 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,264 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,266 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:22:53,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:22:53,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:22:53,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:22:53,277 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (1/1) ... [2023-12-18 18:22:53,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:22:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:22:53,313 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) [2023-12-18 18:22:53,331 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 [2023-12-18 18:22:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:22:53,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:22:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:22:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:22:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 18:22:53,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:22:53,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:22:53,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:22:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:22:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:22:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:22:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:22:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:22:53,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 18:22:53,426 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:22:53,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:22:53,624 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:22:53,650 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:22:53,650 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-18 18:22:53,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:22:53 BoogieIcfgContainer [2023-12-18 18:22:53,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:22:53,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:22:53,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:22:53,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:22:53,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:22:52" (1/3) ... [2023-12-18 18:22:53,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0a5403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:22:53, skipping insertion in model container [2023-12-18 18:22:53,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:22:53" (2/3) ... [2023-12-18 18:22:53,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0a5403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:22:53, skipping insertion in model container [2023-12-18 18:22:53,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:22:53" (3/3) ... [2023-12-18 18:22:53,660 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2023-12-18 18:22:53,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:22:53,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:22:53,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:22:53,714 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;@6047ebe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:22:53,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:22:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 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) [2023-12-18 18:22:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:22:53,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:53,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:53,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:53,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1198131770, now seen corresponding path program 1 times [2023-12-18 18:22:53,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:53,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551027048] [2023-12-18 18:22:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:22:53,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:53,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551027048] [2023-12-18 18:22:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551027048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:22:53,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:22:53,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:22:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284159024] [2023-12-18 18:22:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:22:53,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:22:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:22:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:22:53,902 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-12-18 18:22:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:53,931 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2023-12-18 18:22:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:22:53,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2023-12-18 18:22:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:53,937 INFO L225 Difference]: With dead ends: 60 [2023-12-18 18:22:53,937 INFO L226 Difference]: Without dead ends: 28 [2023-12-18 18:22:53,940 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 [2023-12-18 18:22:53,944 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:53,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:22:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-18 18:22:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-18 18:22:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2023-12-18 18:22:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-12-18 18:22:53,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2023-12-18 18:22:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:53,984 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-12-18 18:22:53,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2023-12-18 18:22:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-12-18 18:22:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:22:53,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:53,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:53,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:22:53,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:53,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:53,986 INFO L85 PathProgramCache]: Analyzing trace with hash 274161569, now seen corresponding path program 1 times [2023-12-18 18:22:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:53,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851542800] [2023-12-18 18:22:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:53,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:22:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851542800] [2023-12-18 18:22:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851542800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:22:54,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:22:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:22:54,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862945820] [2023-12-18 18:22:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:22:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:22:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:22:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:22:54,173 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-18 18:22:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:54,216 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2023-12-18 18:22:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:22:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2023-12-18 18:22:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:54,218 INFO L225 Difference]: With dead ends: 33 [2023-12-18 18:22:54,218 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 18:22:54,219 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 [2023-12-18 18:22:54,219 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:22:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 18:22:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-12-18 18:22:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-12-18 18:22:54,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 18 [2023-12-18 18:22:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:54,228 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-12-18 18:22:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-18 18:22:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-12-18 18:22:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:22:54,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:54,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:54,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:22:54,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash 274221151, now seen corresponding path program 1 times [2023-12-18 18:22:54,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882831275] [2023-12-18 18:22:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:54,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:22:54,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:54,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882831275] [2023-12-18 18:22:54,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882831275] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:22:54,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:22:54,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 18:22:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137435530] [2023-12-18 18:22:54,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:22:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 18:22:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 18:22:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-18 18:22:54,420 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-12-18 18:22:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:54,489 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2023-12-18 18:22:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:22:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2023-12-18 18:22:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:54,492 INFO L225 Difference]: With dead ends: 64 [2023-12-18 18:22:54,494 INFO L226 Difference]: Without dead ends: 42 [2023-12-18 18:22:54,494 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 [2023-12-18 18:22:54,500 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:54,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:22:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-18 18:22:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-12-18 18:22:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-12-18 18:22:54,505 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2023-12-18 18:22:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:54,505 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-12-18 18:22:54,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-12-18 18:22:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-12-18 18:22:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 18:22:54,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:54,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 18:22:54,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:54,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash -658811714, now seen corresponding path program 1 times [2023-12-18 18:22:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116111371] [2023-12-18 18:22:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:22:54,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116111371] [2023-12-18 18:22:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116111371] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:22:54,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:22:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:22:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305405043] [2023-12-18 18:22:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:22:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:22:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:22:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:22:54,628 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:54,659 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-12-18 18:22:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:22:54,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 18:22:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:54,659 INFO L225 Difference]: With dead ends: 47 [2023-12-18 18:22:54,659 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 18:22:54,660 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 [2023-12-18 18:22:54,660 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:54,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:22:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 18:22:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-18 18:22:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2023-12-18 18:22:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-12-18 18:22:54,665 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2023-12-18 18:22:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:54,665 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-12-18 18:22:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-12-18 18:22:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 18:22:54,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:54,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-18 18:22:54,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:54,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 21246656, now seen corresponding path program 1 times [2023-12-18 18:22:54,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:54,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401042339] [2023-12-18 18:22:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:54,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:22:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401042339] [2023-12-18 18:22:55,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401042339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:22:55,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745510251] [2023-12-18 18:22:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:22:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:22:55,701 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) [2023-12-18 18:22:55,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:22:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:55,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-18 18:22:55,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:22:55,886 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 [2023-12-18 18:22:55,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:55,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 32 [2023-12-18 18:22:55,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:55,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:55,993 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 48 treesize of output 25 [2023-12-18 18:22:56,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:56,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 11 [2023-12-18 18:22:56,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:56,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:56,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:22:56,107 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 15 treesize of output 7 [2023-12-18 18:22:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:22:56,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:22:56,307 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 [2023-12-18 18:22:56,309 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 [2023-12-18 18:22:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:22:56,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745510251] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:22:56,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:22:56,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-12-18 18:22:56,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016583515] [2023-12-18 18:22:56,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:22:56,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 18:22:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 18:22:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-18 18:22:56,339 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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) [2023-12-18 18:22:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:56,557 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2023-12-18 18:22:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 18:22:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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 [2023-12-18 18:22:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:56,560 INFO L225 Difference]: With dead ends: 87 [2023-12-18 18:22:56,560 INFO L226 Difference]: Without dead ends: 59 [2023-12-18 18:22:56,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-12-18 18:22:56,564 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 176 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:56,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 80 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:22:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-18 18:22:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2023-12-18 18:22:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-12-18 18:22:56,572 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 30 [2023-12-18 18:22:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:56,572 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-12-18 18:22:56,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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) [2023-12-18 18:22:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-12-18 18:22:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 18:22:56,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:56,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:56,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 18:22:56,778 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 [2023-12-18 18:22:56,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:56,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:56,779 INFO L85 PathProgramCache]: Analyzing trace with hash -823917634, now seen corresponding path program 1 times [2023-12-18 18:22:56,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:56,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770977235] [2023-12-18 18:22:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:22:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770977235] [2023-12-18 18:22:57,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770977235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:22:57,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608873592] [2023-12-18 18:22:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:57,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:22:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:22:57,361 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) [2023-12-18 18:22:57,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:22:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:57,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 18:22:57,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:22:57,511 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 [2023-12-18 18:22:57,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:57,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:22:57,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:57,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:57,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2023-12-18 18:22:57,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:57,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:57,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:22:57,667 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 15 treesize of output 7 [2023-12-18 18:22:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:22:57,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:22:57,837 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 [2023-12-18 18:22:57,839 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 [2023-12-18 18:22:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:22:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608873592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:22:57,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:22:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-18 18:22:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074327152] [2023-12-18 18:22:57,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:22:57,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 18:22:57,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 18:22:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-12-18 18:22:57,882 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2023-12-18 18:22:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:58,102 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2023-12-18 18:22:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 18:22:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 35 [2023-12-18 18:22:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:58,105 INFO L225 Difference]: With dead ends: 83 [2023-12-18 18:22:58,105 INFO L226 Difference]: Without dead ends: 58 [2023-12-18 18:22:58,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2023-12-18 18:22:58,107 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:58,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 65 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:22:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-18 18:22:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2023-12-18 18:22:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:22:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-12-18 18:22:58,116 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2023-12-18 18:22:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:58,117 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-12-18 18:22:58,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2023-12-18 18:22:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-12-18 18:22:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:22:58,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:58,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:58,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-18 18:22:58,326 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 [2023-12-18 18:22:58,326 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:58,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1310007680, now seen corresponding path program 2 times [2023-12-18 18:22:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:58,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621580678] [2023-12-18 18:22:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:22:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:22:58,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:22:58,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621580678] [2023-12-18 18:22:58,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621580678] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:22:58,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722029450] [2023-12-18 18:22:58,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:22:58,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:22:58,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:22:58,831 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) [2023-12-18 18:22:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:22:58,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:22:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:22:58,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 18:22:58,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:22:58,992 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 [2023-12-18 18:22:59,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:59,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:22:59,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:22:59,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:22:59,068 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 48 treesize of output 25 [2023-12-18 18:22:59,146 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 15 treesize of output 7 [2023-12-18 18:22:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:22:59,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:22:59,288 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 [2023-12-18 18:22:59,292 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 [2023-12-18 18:22:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:22:59,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722029450] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:22:59,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:22:59,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-12-18 18:22:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083880671] [2023-12-18 18:22:59,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:22:59,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 18:22:59,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:22:59,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 18:22:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-18 18:22:59,329 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2023-12-18 18:22:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:22:59,579 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2023-12-18 18:22:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 18:22:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-18 18:22:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:22:59,580 INFO L225 Difference]: With dead ends: 91 [2023-12-18 18:22:59,581 INFO L226 Difference]: Without dead ends: 66 [2023-12-18 18:22:59,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:22:59,584 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:22:59,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 100 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:22:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-18 18:22:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2023-12-18 18:22:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 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) [2023-12-18 18:22:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-12-18 18:22:59,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2023-12-18 18:22:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:22:59,596 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-12-18 18:22:59,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2023-12-18 18:22:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-12-18 18:22:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 18:22:59,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:22:59,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:22:59,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:22:59,805 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 [2023-12-18 18:22:59,806 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:22:59,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:22:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1830440190, now seen corresponding path program 3 times [2023-12-18 18:22:59,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:22:59,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177706892] [2023-12-18 18:22:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:22:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:22:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:00,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177706892] [2023-12-18 18:23:00,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177706892] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:00,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518252704] [2023-12-18 18:23:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:23:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:00,161 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) [2023-12-18 18:23:00,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:23:00,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 18:23:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:00,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 18:23:00,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:00,296 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 [2023-12-18 18:23:00,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:00,309 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 29 [2023-12-18 18:23:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:00,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:00,448 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 [2023-12-18 18:23:00,450 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 [2023-12-18 18:23:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518252704] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:00,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:00,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2023-12-18 18:23:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283687355] [2023-12-18 18:23:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 18:23:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 18:23:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-12-18 18:23:00,455 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:23:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:00,775 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-12-18 18:23:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 18:23:00,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 18:23:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:00,776 INFO L225 Difference]: With dead ends: 75 [2023-12-18 18:23:00,776 INFO L226 Difference]: Without dead ends: 73 [2023-12-18 18:23:00,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 18:23:00,777 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:00,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 122 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:23:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-18 18:23:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2023-12-18 18:23:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 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) [2023-12-18 18:23:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-12-18 18:23:00,791 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 45 [2023-12-18 18:23:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:00,793 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-12-18 18:23:00,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:23:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-12-18 18:23:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 18:23:00,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:00,793 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:00,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:00,999 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 [2023-12-18 18:23:00,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:00,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 547004480, now seen corresponding path program 4 times [2023-12-18 18:23:01,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:01,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776732708] [2023-12-18 18:23:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:01,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:01,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776732708] [2023-12-18 18:23:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776732708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:01,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382599441] [2023-12-18 18:23:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:23:01,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:01,289 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) [2023-12-18 18:23:01,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:23:01,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:23:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:01,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:23:01,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:01,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:23:01,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382599441] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:01,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-12-18 18:23:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327332912] [2023-12-18 18:23:01,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-18 18:23:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-18 18:23:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2023-12-18 18:23:01,782 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 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) [2023-12-18 18:23:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:02,117 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2023-12-18 18:23:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 18:23:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 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 50 [2023-12-18 18:23:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:02,118 INFO L225 Difference]: With dead ends: 148 [2023-12-18 18:23:02,118 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 18:23:02,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 18:23:02,122 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:02,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 153 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:23:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 18:23:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2023-12-18 18:23:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 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) [2023-12-18 18:23:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-12-18 18:23:02,129 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 50 [2023-12-18 18:23:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:02,129 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-12-18 18:23:02,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 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) [2023-12-18 18:23:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-12-18 18:23:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 18:23:02,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:02,130 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:02,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 18:23:02,335 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 [2023-12-18 18:23:02,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 73591871, now seen corresponding path program 5 times [2023-12-18 18:23:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123008511] [2023-12-18 18:23:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 18:23:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123008511] [2023-12-18 18:23:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123008511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720600579] [2023-12-18 18:23:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:23:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:02,898 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) [2023-12-18 18:23:02,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:23:03,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 18:23:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:03,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 18:23:03,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:03,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 18:23:03,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:03,565 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 29 [2023-12-18 18:23:03,593 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-18 18:23:03,594 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 35 treesize of output 13 [2023-12-18 18:23:03,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:03,607 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 69 treesize of output 37 [2023-12-18 18:23:03,709 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 7 [2023-12-18 18:23:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 18:23:03,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:04,125 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 67 treesize of output 61 [2023-12-18 18:23:04,128 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 102 treesize of output 94 [2023-12-18 18:23:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-18 18:23:04,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720600579] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:04,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:04,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 29 [2023-12-18 18:23:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096980977] [2023-12-18 18:23:04,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 18:23:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 18:23:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-12-18 18:23:04,186 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 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) [2023-12-18 18:23:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:04,405 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2023-12-18 18:23:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 18:23:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 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 62 [2023-12-18 18:23:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:04,406 INFO L225 Difference]: With dead ends: 81 [2023-12-18 18:23:04,407 INFO L226 Difference]: Without dead ends: 72 [2023-12-18 18:23:04,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2023-12-18 18:23:04,407 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:04,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 153 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:23:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-18 18:23:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2023-12-18 18:23:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 18:23:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-12-18 18:23:04,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 62 [2023-12-18 18:23:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:04,415 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-12-18 18:23:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 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) [2023-12-18 18:23:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-12-18 18:23:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 18:23:04,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:04,416 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:04,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:04,626 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 [2023-12-18 18:23:04,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:04,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 753650241, now seen corresponding path program 6 times [2023-12-18 18:23:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57256886] [2023-12-18 18:23:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:23:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57256886] [2023-12-18 18:23:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57256886] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359834797] [2023-12-18 18:23:06,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:23:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:06,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:06,476 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) [2023-12-18 18:23:06,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:23:06,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 18:23:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:06,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-18 18:23:06,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:06,888 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 [2023-12-18 18:23:06,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 32 [2023-12-18 18:23:06,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:06,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:06,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:23:07,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:07,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:07,048 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 37 treesize of output 25 [2023-12-18 18:23:07,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:07,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:07,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:23:07,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:07,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:07,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:23:07,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:07,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:07,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:23:07,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-12-18 18:23:07,197 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 18:23:07,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 33 [2023-12-18 18:23:07,449 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 15 treesize of output 7 [2023-12-18 18:23:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:23:07,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:08,193 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 [2023-12-18 18:23:08,195 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 [2023-12-18 18:23:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:23:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359834797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:08,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:08,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-12-18 18:23:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873884103] [2023-12-18 18:23:08,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:08,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 18:23:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 18:23:08,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 18:23:08,372 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 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) [2023-12-18 18:23:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:11,021 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2023-12-18 18:23:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-18 18:23:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 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 [2023-12-18 18:23:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:11,023 INFO L225 Difference]: With dead ends: 185 [2023-12-18 18:23:11,023 INFO L226 Difference]: Without dead ends: 176 [2023-12-18 18:23:11,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1355, Invalid=7201, Unknown=0, NotChecked=0, Total=8556 [2023-12-18 18:23:11,025 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 654 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:11,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 214 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:23:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-12-18 18:23:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 68. [2023-12-18 18:23:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 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) [2023-12-18 18:23:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-12-18 18:23:11,034 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 62 [2023-12-18 18:23:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:11,034 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-12-18 18:23:11,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.023255813953488) internal successors, (173), 43 states have internal predecessors, (173), 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) [2023-12-18 18:23:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-12-18 18:23:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-18 18:23:11,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:11,035 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:11,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:11,244 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 [2023-12-18 18:23:11,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:11,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1535374557, now seen corresponding path program 7 times [2023-12-18 18:23:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:11,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975251633] [2023-12-18 18:23:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:23:12,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:12,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975251633] [2023-12-18 18:23:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975251633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127734965] [2023-12-18 18:23:12,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:23:12,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:12,855 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) [2023-12-18 18:23:12,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:23:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:12,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 18:23:12,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:13,099 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 [2023-12-18 18:23:13,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:13,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:23:13,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:13,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:13,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:23:13,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:13,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:13,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2023-12-18 18:23:13,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:13,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:13,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:23:13,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:13,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:13,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:23:13,485 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 15 treesize of output 7 [2023-12-18 18:23:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:23:13,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:26,061 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 [2023-12-18 18:23:26,064 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 [2023-12-18 18:23:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 18:23:26,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127734965] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:26,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:26,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 14] total 40 [2023-12-18 18:23:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246855104] [2023-12-18 18:23:26,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-18 18:23:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-18 18:23:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 18:23:26,155 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 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) [2023-12-18 18:23:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:27,605 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2023-12-18 18:23:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 18:23:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 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 67 [2023-12-18 18:23:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:27,609 INFO L225 Difference]: With dead ends: 182 [2023-12-18 18:23:27,609 INFO L226 Difference]: Without dead ends: 173 [2023-12-18 18:23:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=634, Invalid=3788, Unknown=0, NotChecked=0, Total=4422 [2023-12-18 18:23:27,610 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 546 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 240 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:23:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-18 18:23:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 73. [2023-12-18 18:23:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 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) [2023-12-18 18:23:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-12-18 18:23:27,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 67 [2023-12-18 18:23:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:27,620 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-12-18 18:23:27,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 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) [2023-12-18 18:23:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-12-18 18:23:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-18 18:23:27,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:27,621 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:27,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:27,826 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 [2023-12-18 18:23:27,826 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:27,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:27,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1101663169, now seen corresponding path program 8 times [2023-12-18 18:23:27,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:27,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773223286] [2023-12-18 18:23:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:27,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 97 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 18:23:28,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773223286] [2023-12-18 18:23:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773223286] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971712763] [2023-12-18 18:23:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:23:28,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:28,612 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) [2023-12-18 18:23:28,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:23:28,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:23:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:28,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-18 18:23:28,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:28,862 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 [2023-12-18 18:23:28,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:28,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:23:28,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:28,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:28,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:23:28,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:23:28,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:28,981 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 48 treesize of output 25 [2023-12-18 18:23:29,224 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 15 treesize of output 7 [2023-12-18 18:23:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:23:29,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:29,611 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 [2023-12-18 18:23:29,613 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 [2023-12-18 18:23:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 18:23:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971712763] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:29,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:29,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 38 [2023-12-18 18:23:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650805593] [2023-12-18 18:23:29,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:29,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 18:23:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 18:23:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 18:23:29,701 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 38 states, 38 states have (on average 5.105263157894737) internal successors, (194), 38 states have internal predecessors, (194), 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) [2023-12-18 18:23:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:31,131 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2023-12-18 18:23:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 18:23:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.105263157894737) internal successors, (194), 38 states have internal predecessors, (194), 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 72 [2023-12-18 18:23:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:31,132 INFO L225 Difference]: With dead ends: 169 [2023-12-18 18:23:31,132 INFO L226 Difference]: Without dead ends: 160 [2023-12-18 18:23:31,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=544, Invalid=3878, Unknown=0, NotChecked=0, Total=4422 [2023-12-18 18:23:31,134 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 483 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:31,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 321 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:23:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-18 18:23:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 78. [2023-12-18 18:23:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.077922077922078) internal successors, (83), 77 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) [2023-12-18 18:23:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-12-18 18:23:31,142 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 72 [2023-12-18 18:23:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:31,143 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-12-18 18:23:31,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.105263157894737) internal successors, (194), 38 states have internal predecessors, (194), 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) [2023-12-18 18:23:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-12-18 18:23:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-18 18:23:31,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:31,143 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:31,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:31,344 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 [2023-12-18 18:23:31,344 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:31,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1391633245, now seen corresponding path program 9 times [2023-12-18 18:23:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:31,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348784175] [2023-12-18 18:23:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:23:31,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:31,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348784175] [2023-12-18 18:23:31,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348784175] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:31,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607056279] [2023-12-18 18:23:31,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:23:31,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:31,972 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) [2023-12-18 18:23:31,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:23:32,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-18 18:23:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:32,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-18 18:23:32,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:32,564 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 [2023-12-18 18:23:32,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:32,571 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 51 treesize of output 31 [2023-12-18 18:23:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 1 proven. 142 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 18:23:32,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:32,899 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 [2023-12-18 18:23:32,901 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 [2023-12-18 18:23:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 18:23:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607056279] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:33,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 20] total 38 [2023-12-18 18:23:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717837842] [2023-12-18 18:23:33,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:33,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-18 18:23:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-18 18:23:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 18:23:33,084 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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) [2023-12-18 18:23:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:35,158 INFO L93 Difference]: Finished difference Result 249 states and 272 transitions. [2023-12-18 18:23:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-18 18:23:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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 77 [2023-12-18 18:23:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:35,159 INFO L225 Difference]: With dead ends: 249 [2023-12-18 18:23:35,159 INFO L226 Difference]: Without dead ends: 204 [2023-12-18 18:23:35,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1346, Invalid=10426, Unknown=0, NotChecked=0, Total=11772 [2023-12-18 18:23:35,162 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 531 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 289 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:23:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-18 18:23:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 116. [2023-12-18 18:23:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 115 states have internal predecessors, (127), 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) [2023-12-18 18:23:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2023-12-18 18:23:35,177 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 77 [2023-12-18 18:23:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:35,177 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2023-12-18 18:23:35,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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) [2023-12-18 18:23:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2023-12-18 18:23:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-18 18:23:35,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:35,178 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:35,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:35,379 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 [2023-12-18 18:23:35,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:35,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:35,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2069598911, now seen corresponding path program 10 times [2023-12-18 18:23:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:35,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930592121] [2023-12-18 18:23:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:35,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:23:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930592121] [2023-12-18 18:23:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930592121] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469389263] [2023-12-18 18:23:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:23:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:35,740 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) [2023-12-18 18:23:35,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:23:35,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:23:35,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:35,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 18:23:35,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 172 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:23:36,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 172 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:23:36,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469389263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:36,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:36,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2023-12-18 18:23:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849968390] [2023-12-18 18:23:36,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:36,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-18 18:23:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-18 18:23:36,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1538, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 18:23:36,716 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 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) [2023-12-18 18:23:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:37,336 INFO L93 Difference]: Finished difference Result 238 states and 255 transitions. [2023-12-18 18:23:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 18:23:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 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 82 [2023-12-18 18:23:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:37,336 INFO L225 Difference]: With dead ends: 238 [2023-12-18 18:23:37,336 INFO L226 Difference]: Without dead ends: 103 [2023-12-18 18:23:37,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=838, Invalid=2822, Unknown=0, NotChecked=0, Total=3660 [2023-12-18 18:23:37,338 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 401 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:37,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 300 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:23:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-18 18:23:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2023-12-18 18:23:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 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) [2023-12-18 18:23:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2023-12-18 18:23:37,348 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 82 [2023-12-18 18:23:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:37,348 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2023-12-18 18:23:37,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.622222222222222) internal successors, (208), 45 states have internal predecessors, (208), 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) [2023-12-18 18:23:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2023-12-18 18:23:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-18 18:23:37,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:37,349 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:37,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:37,549 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 [2023-12-18 18:23:37,549 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:37,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1076054558, now seen corresponding path program 11 times [2023-12-18 18:23:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:37,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039747310] [2023-12-18 18:23:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 16 proven. 168 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:23:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039747310] [2023-12-18 18:23:39,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039747310] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181703817] [2023-12-18 18:23:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:23:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:39,364 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) [2023-12-18 18:23:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:23:42,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-18 18:23:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:42,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 18:23:42,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:42,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-18 18:23:42,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:42,590 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 51 treesize of output 31 [2023-12-18 18:23:42,621 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-18 18:23:42,621 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 35 treesize of output 13 [2023-12-18 18:23:42,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:42,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 49 [2023-12-18 18:23:42,921 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 7 [2023-12-18 18:23:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 51 proven. 131 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-18 18:23:42,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:23:43,320 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 67 treesize of output 61 [2023-12-18 18:23:43,322 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 102 treesize of output 94 [2023-12-18 18:23:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 51 proven. 131 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-18 18:23:43,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181703817] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:23:43,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:23:43,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 46 [2023-12-18 18:23:43,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521260949] [2023-12-18 18:23:43,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:23:43,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-18 18:23:43,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:23:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-18 18:23:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 18:23:43,437 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 46 states, 46 states have (on average 4.630434782608695) internal successors, (213), 46 states have internal predecessors, (213), 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) [2023-12-18 18:23:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:23:45,569 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2023-12-18 18:23:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 18:23:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.630434782608695) internal successors, (213), 46 states have internal predecessors, (213), 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 94 [2023-12-18 18:23:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:23:45,572 INFO L225 Difference]: With dead ends: 171 [2023-12-18 18:23:45,572 INFO L226 Difference]: Without dead ends: 162 [2023-12-18 18:23:45,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 174 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=722, Invalid=5920, Unknown=0, NotChecked=0, Total=6642 [2023-12-18 18:23:45,574 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 367 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 3478 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:23:45,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 624 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3478 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 18:23:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-18 18:23:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2023-12-18 18:23:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 99 states have internal predecessors, (105), 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) [2023-12-18 18:23:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2023-12-18 18:23:45,586 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 94 [2023-12-18 18:23:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:23:45,586 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2023-12-18 18:23:45,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.630434782608695) internal successors, (213), 46 states have internal predecessors, (213), 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) [2023-12-18 18:23:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2023-12-18 18:23:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-18 18:23:45,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:23:45,587 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:23:45,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 18:23:45,796 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 [2023-12-18 18:23:45,796 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:23:45,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:23:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash -135939814, now seen corresponding path program 12 times [2023-12-18 18:23:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:23:45,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095943801] [2023-12-18 18:23:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:23:45,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:23:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:23:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:23:47,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:23:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095943801] [2023-12-18 18:23:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095943801] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:23:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595516993] [2023-12-18 18:23:47,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:23:47,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:23:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:23:47,929 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) [2023-12-18 18:23:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:23:49,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 18:23:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:23:49,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-18 18:23:49,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:23:49,863 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 25 treesize of output 1 [2023-12-18 18:23:49,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:49,900 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 72 treesize of output 40 [2023-12-18 18:23:50,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2023-12-18 18:23:50,054 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-12-18 18:23:50,054 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 2 case distinctions, treesize of input 69 treesize of output 25 [2023-12-18 18:23:50,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2023-12-18 18:23:50,115 INFO L349 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2023-12-18 18:23:50,115 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 2 case distinctions, treesize of input 69 treesize of output 29 [2023-12-18 18:23:50,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2023-12-18 18:23:50,226 INFO L349 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2023-12-18 18:23:50,227 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 4 case distinctions, treesize of input 90 treesize of output 49 [2023-12-18 18:23:50,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-18 18:23:50,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:50,357 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 29 [2023-12-18 18:23:50,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-18 18:23:50,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:50,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 40 [2023-12-18 18:23:50,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-18 18:23:50,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:23:50,473 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 51 treesize of output 31 [2023-12-18 18:23:50,975 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 7 [2023-12-18 18:23:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 24 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:23:50,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:24:42,100 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 [2023-12-18 18:24:42,103 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 [2023-12-18 18:24:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:24:43,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595516993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:24:43,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:24:43,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 34] total 90 [2023-12-18 18:24:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631188014] [2023-12-18 18:24:43,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:24:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-18 18:24:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:24:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-18 18:24:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=7166, Unknown=12, NotChecked=0, Total=8010 [2023-12-18 18:24:43,059 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 90 states, 90 states have (on average 3.066666666666667) internal successors, (276), 90 states have internal predecessors, (276), 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) [2023-12-18 18:25:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:25:00,371 INFO L93 Difference]: Finished difference Result 567 states and 625 transitions. [2023-12-18 18:25:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-12-18 18:25:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.066666666666667) internal successors, (276), 90 states have internal predecessors, (276), 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 99 [2023-12-18 18:25:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:25:00,372 INFO L225 Difference]: With dead ends: 567 [2023-12-18 18:25:00,372 INFO L226 Difference]: Without dead ends: 490 [2023-12-18 18:25:00,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 135 SyntacticMatches, 12 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17970 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=8094, Invalid=53150, Unknown=12, NotChecked=0, Total=61256 [2023-12-18 18:25:00,376 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 3873 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 8787 mSolverCounterSat, 1844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3873 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 10631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1844 IncrementalHoareTripleChecker+Valid, 8787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:25:00,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3873 Valid, 1540 Invalid, 10631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1844 Valid, 8787 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-18 18:25:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-12-18 18:25:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 150. [2023-12-18 18:25:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0536912751677852) internal successors, (157), 149 states have internal predecessors, (157), 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) [2023-12-18 18:25:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2023-12-18 18:25:00,400 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 99 [2023-12-18 18:25:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:25:00,400 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2023-12-18 18:25:00,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.066666666666667) internal successors, (276), 90 states have internal predecessors, (276), 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) [2023-12-18 18:25:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2023-12-18 18:25:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-18 18:25:00,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:25:00,401 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:25:00,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 18:25:00,602 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 [2023-12-18 18:25:00,603 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:25:00,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:25:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 400188836, now seen corresponding path program 13 times [2023-12-18 18:25:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:25:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722452263] [2023-12-18 18:25:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:25:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:25:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 20 proven. 281 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:25:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:25:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722452263] [2023-12-18 18:25:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722452263] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:25:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829605091] [2023-12-18 18:25:02,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:25:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:25:02,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:25:02,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:25:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:02,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-18 18:25:02,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:25:02,528 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 [2023-12-18 18:25:02,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:02,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:25:02,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:02,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:02,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:02,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:02,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:02,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:02,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:02,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:02,728 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 48 treesize of output 25 [2023-12-18 18:25:03,243 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 15 treesize of output 7 [2023-12-18 18:25:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 20 proven. 291 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 18:25:03,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:25:04,582 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 [2023-12-18 18:25:04,584 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 [2023-12-18 18:25:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 18:25:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829605091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:25:04,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:25:04,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 21] total 63 [2023-12-18 18:25:04,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144674120] [2023-12-18 18:25:04,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:25:04,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-18 18:25:04,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:25:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-18 18:25:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3640, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 18:25:04,756 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand has 63 states, 63 states have (on average 4.507936507936508) internal successors, (284), 63 states have internal predecessors, (284), 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) [2023-12-18 18:25:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:25:11,650 INFO L93 Difference]: Finished difference Result 358 states and 398 transitions. [2023-12-18 18:25:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-18 18:25:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.507936507936508) internal successors, (284), 63 states have internal predecessors, (284), 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 104 [2023-12-18 18:25:11,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:25:11,652 INFO L225 Difference]: With dead ends: 358 [2023-12-18 18:25:11,652 INFO L226 Difference]: Without dead ends: 349 [2023-12-18 18:25:11,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5919 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2154, Invalid=19898, Unknown=0, NotChecked=0, Total=22052 [2023-12-18 18:25:11,653 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1582 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 5189 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 5823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 5189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:25:11,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 773 Invalid, 5823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 5189 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-18 18:25:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-18 18:25:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 155. [2023-12-18 18:25:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.051948051948052) internal successors, (162), 154 states have internal predecessors, (162), 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) [2023-12-18 18:25:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 162 transitions. [2023-12-18 18:25:11,684 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 162 transitions. Word has length 104 [2023-12-18 18:25:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:25:11,684 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 162 transitions. [2023-12-18 18:25:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.507936507936508) internal successors, (284), 63 states have internal predecessors, (284), 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) [2023-12-18 18:25:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 162 transitions. [2023-12-18 18:25:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-18 18:25:11,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:25:11,685 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:25:11,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-18 18:25:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:11,889 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:25:11,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:25:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1030618970, now seen corresponding path program 14 times [2023-12-18 18:25:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:25:11,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348625170] [2023-12-18 18:25:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:25:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:25:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 18:25:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:25:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348625170] [2023-12-18 18:25:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348625170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:25:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856187539] [2023-12-18 18:25:12,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:25:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:25:12,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:25:12,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 18:25:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:25:12,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:25:12,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-18 18:25:12,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:25:12,873 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 [2023-12-18 18:25:12,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:12,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-18 18:25:13,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:25:13,615 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 [2023-12-18 18:25:13,616 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 [2023-12-18 18:25:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:25:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856187539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:25:13,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:25:13,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 44 [2023-12-18 18:25:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116852123] [2023-12-18 18:25:13,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:25:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 18:25:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:25:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 18:25:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 18:25:13,625 INFO L87 Difference]: Start difference. First operand 155 states and 162 transitions. Second operand has 44 states, 44 states have (on average 4.636363636363637) internal successors, (204), 44 states have internal predecessors, (204), 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) [2023-12-18 18:25:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:25:15,927 INFO L93 Difference]: Finished difference Result 255 states and 274 transitions. [2023-12-18 18:25:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-18 18:25:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.636363636363637) internal successors, (204), 44 states have internal predecessors, (204), 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 109 [2023-12-18 18:25:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:25:15,928 INFO L225 Difference]: With dead ends: 255 [2023-12-18 18:25:15,928 INFO L226 Difference]: Without dead ends: 253 [2023-12-18 18:25:15,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=956, Invalid=10816, Unknown=0, NotChecked=0, Total=11772 [2023-12-18 18:25:15,930 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 175 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:25:15,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 485 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 18:25:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-12-18 18:25:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 160. [2023-12-18 18:25:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0566037735849056) internal successors, (168), 159 states have internal predecessors, (168), 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) [2023-12-18 18:25:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2023-12-18 18:25:15,961 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 109 [2023-12-18 18:25:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:25:15,961 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2023-12-18 18:25:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.636363636363637) internal successors, (204), 44 states have internal predecessors, (204), 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) [2023-12-18 18:25:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2023-12-18 18:25:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-18 18:25:15,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:25:15,962 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:25:15,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 18:25:16,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:16,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:25:16,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:25:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -406583452, now seen corresponding path program 15 times [2023-12-18 18:25:16,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:25:16,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782029827] [2023-12-18 18:25:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:25:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:25:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 322 proven. 68 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:25:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:25:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782029827] [2023-12-18 18:25:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782029827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:25:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591055422] [2023-12-18 18:25:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:25:16,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:25:16,752 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:25:16,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 18:25:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-18 18:25:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:25:18,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 18:25:18,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:25:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 44 proven. 377 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:25:19,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:25:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 378 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:25:20,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591055422] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:25:20,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:25:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 28] total 73 [2023-12-18 18:25:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218363446] [2023-12-18 18:25:20,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:25:20,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-18 18:25:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:25:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-18 18:25:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3927, Unknown=0, NotChecked=0, Total=5256 [2023-12-18 18:25:20,519 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand has 73 states, 73 states have (on average 4.219178082191781) internal successors, (308), 73 states have internal predecessors, (308), 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) [2023-12-18 18:25:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:25:21,261 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2023-12-18 18:25:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 18:25:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.219178082191781) internal successors, (308), 73 states have internal predecessors, (308), 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 114 [2023-12-18 18:25:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:25:21,262 INFO L225 Difference]: With dead ends: 239 [2023-12-18 18:25:21,262 INFO L226 Difference]: Without dead ends: 135 [2023-12-18 18:25:21,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1458, Invalid=4394, Unknown=0, NotChecked=0, Total=5852 [2023-12-18 18:25:21,263 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 315 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:25:21,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 503 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 18:25:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-18 18:25:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2023-12-18 18:25:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 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) [2023-12-18 18:25:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2023-12-18 18:25:21,285 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 114 [2023-12-18 18:25:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:25:21,285 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2023-12-18 18:25:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.219178082191781) internal successors, (308), 73 states have internal predecessors, (308), 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) [2023-12-18 18:25:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2023-12-18 18:25:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-18 18:25:21,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:25:21,286 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:25:21,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 18:25:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:21,491 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:25:21,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:25:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 509799715, now seen corresponding path program 16 times [2023-12-18 18:25:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:25:21,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396962917] [2023-12-18 18:25:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:25:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:25:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 24 proven. 376 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:25:24,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:25:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396962917] [2023-12-18 18:25:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396962917] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:25:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664714513] [2023-12-18 18:25:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:25:24,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:24,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:25:24,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:25:24,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 18:25:24,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:25:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:25:24,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-18 18:25:24,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:25:25,029 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 [2023-12-18 18:25:25,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:25,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:25:25,086 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 31 treesize of output 11 [2023-12-18 18:25:25,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:25,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 33 [2023-12-18 18:25:25,635 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 15 treesize of output 7 [2023-12-18 18:25:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 79 proven. 336 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-18 18:25:25,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:25:26,213 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 67 treesize of output 61 [2023-12-18 18:25:26,215 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 [2023-12-18 18:25:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 79 proven. 319 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-18 18:25:26,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664714513] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:25:26,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:25:26,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 60 [2023-12-18 18:25:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375337033] [2023-12-18 18:25:26,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:25:26,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-18 18:25:26,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:25:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-18 18:25:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 18:25:26,397 INFO L87 Difference]: Start difference. First operand 127 states and 133 transitions. Second operand has 60 states, 60 states have (on average 4.8) internal successors, (288), 60 states have internal predecessors, (288), 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) [2023-12-18 18:25:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:25:32,431 INFO L93 Difference]: Finished difference Result 332 states and 375 transitions. [2023-12-18 18:25:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-18 18:25:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.8) internal successors, (288), 60 states have internal predecessors, (288), 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 126 [2023-12-18 18:25:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:25:32,434 INFO L225 Difference]: With dead ends: 332 [2023-12-18 18:25:32,434 INFO L226 Difference]: Without dead ends: 323 [2023-12-18 18:25:32,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 233 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4430 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1483, Invalid=15547, Unknown=0, NotChecked=0, Total=17030 [2023-12-18 18:25:32,436 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 654 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 9411 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 9698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 9411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-18 18:25:32,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1197 Invalid, 9698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 9411 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-18 18:25:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-12-18 18:25:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 132. [2023-12-18 18:25:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0458015267175573) internal successors, (137), 131 states have internal predecessors, (137), 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) [2023-12-18 18:25:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2023-12-18 18:25:32,472 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 126 [2023-12-18 18:25:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:25:32,472 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2023-12-18 18:25:32,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.8) internal successors, (288), 60 states have internal predecessors, (288), 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) [2023-12-18 18:25:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2023-12-18 18:25:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-18 18:25:32,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:25:32,473 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:25:32,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-18 18:25:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:32,680 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:25:32,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:25:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 110420601, now seen corresponding path program 17 times [2023-12-18 18:25:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:25:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711668410] [2023-12-18 18:25:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:25:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:25:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:25:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 29 proven. 501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:25:35,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:25:35,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711668410] [2023-12-18 18:25:35,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711668410] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:25:35,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107056350] [2023-12-18 18:25:35,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:25:35,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:25:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:25:35,712 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:25:35,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 18:25:42,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-12-18 18:25:42,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:25:42,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-18 18:25:42,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:25:42,440 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 [2023-12-18 18:25:42,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:42,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:25:42,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:25:42,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:25:42,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 11 [2023-12-18 18:25:42,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:42,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:42,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:25:42,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:25:42,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:25:42,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:25:43,469 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 15 treesize of output 7 [2023-12-18 18:25:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 26 proven. 492 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:25:43,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:25:53,038 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 [2023-12-18 18:25:53,039 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 [2023-12-18 18:25:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 26 proven. 459 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:25:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107056350] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:25:53,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:25:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28, 26] total 87 [2023-12-18 18:25:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638771756] [2023-12-18 18:25:53,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:25:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-18 18:25:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:25:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-18 18:25:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=6920, Unknown=0, NotChecked=0, Total=7482 [2023-12-18 18:25:53,212 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand has 87 states, 87 states have (on average 4.137931034482759) internal successors, (360), 87 states have internal predecessors, (360), 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) [2023-12-18 18:26:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:26:18,719 INFO L93 Difference]: Finished difference Result 1186 states and 1283 transitions. [2023-12-18 18:26:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 359 states. [2023-12-18 18:26:18,721 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.137931034482759) internal successors, (360), 87 states have internal predecessors, (360), 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 131 [2023-12-18 18:26:18,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:26:18,723 INFO L225 Difference]: With dead ends: 1186 [2023-12-18 18:26:18,724 INFO L226 Difference]: Without dead ends: 1083 [2023-12-18 18:26:18,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 212 SyntacticMatches, 16 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69912 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=13063, Invalid=180097, Unknown=0, NotChecked=0, Total=193160 [2023-12-18 18:26:18,730 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 5186 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 10191 mSolverCounterSat, 2169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5186 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 12360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2169 IncrementalHoareTripleChecker+Valid, 10191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:26:18,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5186 Valid, 1189 Invalid, 12360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2169 Valid, 10191 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-18 18:26:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-12-18 18:26:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 188. [2023-12-18 18:26:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0481283422459893) internal successors, (196), 187 states have internal predecessors, (196), 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) [2023-12-18 18:26:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 196 transitions. [2023-12-18 18:26:18,776 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 196 transitions. Word has length 131 [2023-12-18 18:26:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:26:18,776 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 196 transitions. [2023-12-18 18:26:18,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.137931034482759) internal successors, (360), 87 states have internal predecessors, (360), 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) [2023-12-18 18:26:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 196 transitions. [2023-12-18 18:26:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-18 18:26:18,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:26:18,777 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:26:18,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 18:26:18,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:26:18,989 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:26:18,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:26:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2002337701, now seen corresponding path program 18 times [2023-12-18 18:26:18,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:26:18,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744403784] [2023-12-18 18:26:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:26:18,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:26:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:26:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 28 proven. 549 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 18:26:21,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:26:21,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744403784] [2023-12-18 18:26:21,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744403784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:26:21,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081899699] [2023-12-18 18:26:21,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:26:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:26:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:26:21,044 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:26:21,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 18:26:25,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-12-18 18:26:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:26:25,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-18 18:26:25,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:26:25,434 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 [2023-12-18 18:26:25,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:26:25,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 18:26:25,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 28 [2023-12-18 18:26:25,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-18 18:26:25,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 35 [2023-12-18 18:26:25,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-18 18:26:25,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 42 [2023-12-18 18:26:25,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 21 [2023-12-18 18:26:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:26:25,884 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 18:26:25,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 68 treesize of output 54 [2023-12-18 18:26:25,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:25,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 21 [2023-12-18 18:26:25,992 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-12-18 18:26:25,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 68 treesize of output 54 [2023-12-18 18:26:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 28 proven. 527 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-18 18:26:27,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:26:31,084 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 2561 treesize of output 2393 [2023-12-18 18:26:31,128 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-18 18:26:31,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2076022 treesize of output 1889678 [2023-12-18 18:26:31,220 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 2561 treesize of output 2393 [2023-12-18 18:26:31,242 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-12-18 18:26:31,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116614 treesize of output 108786 [2023-12-18 18:26:31,331 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-18 18:26:31,334 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 2561 treesize of output 2393 [2023-12-18 18:26:31,343 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-12-18 18:26:31,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31414 treesize of output 1 [2023-12-18 18:26:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 35 proven. 520 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-18 18:26:31,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081899699] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:26:31,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:26:31,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 32] total 95 [2023-12-18 18:26:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551583189] [2023-12-18 18:26:31,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:26:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-18 18:26:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:26:31,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-18 18:26:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=8195, Unknown=0, NotChecked=0, Total=8930 [2023-12-18 18:26:31,614 INFO L87 Difference]: Start difference. First operand 188 states and 196 transitions. Second operand has 95 states, 95 states have (on average 3.7157894736842105) internal successors, (353), 95 states have internal predecessors, (353), 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) [2023-12-18 18:26:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:26:53,878 INFO L93 Difference]: Finished difference Result 434 states and 486 transitions. [2023-12-18 18:26:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-12-18 18:26:53,879 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.7157894736842105) internal successors, (353), 95 states have internal predecessors, (353), 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 136 [2023-12-18 18:26:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:26:53,880 INFO L225 Difference]: With dead ends: 434 [2023-12-18 18:26:53,880 INFO L226 Difference]: Without dead ends: 425 [2023-12-18 18:26:53,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11402 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=4016, Invalid=36586, Unknown=0, NotChecked=0, Total=40602 [2023-12-18 18:26:53,882 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2541 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 9230 mSolverCounterSat, 1401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2541 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 10631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1401 IncrementalHoareTripleChecker+Valid, 9230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:26:53,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2541 Valid, 1311 Invalid, 10631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1401 Valid, 9230 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-18 18:26:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-12-18 18:26:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 193. [2023-12-18 18:26:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.046875) internal successors, (201), 192 states have internal predecessors, (201), 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) [2023-12-18 18:26:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 201 transitions. [2023-12-18 18:26:53,930 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 201 transitions. Word has length 136 [2023-12-18 18:26:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:26:53,930 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 201 transitions. [2023-12-18 18:26:53,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.7157894736842105) internal successors, (353), 95 states have internal predecessors, (353), 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) [2023-12-18 18:26:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 201 transitions. [2023-12-18 18:26:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-18 18:26:53,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:26:53,931 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:26:53,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 18:26:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:26:54,144 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:26:54,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:26:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -555991559, now seen corresponding path program 19 times [2023-12-18 18:26:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:26:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12497831] [2023-12-18 18:26:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:26:54,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:26:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:26:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 629 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-18 18:26:55,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:26:55,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12497831] [2023-12-18 18:26:55,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12497831] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:26:55,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217992352] [2023-12-18 18:26:55,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:26:55,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:26:55,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:26:55,037 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:26:55,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 18:26:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:26:55,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-18 18:26:55,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:26:55,425 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 [2023-12-18 18:26:55,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:26:55,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:26:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 628 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:26:56,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:26:56,425 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 [2023-12-18 18:26:56,427 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 [2023-12-18 18:26:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:26:56,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217992352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:26:56,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:26:56,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 27] total 54 [2023-12-18 18:26:56,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543088407] [2023-12-18 18:26:56,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:26:56,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 18:26:56,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:26:56,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 18:26:56,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 18:26:56,438 INFO L87 Difference]: Start difference. First operand 193 states and 201 transitions. Second operand has 54 states, 54 states have (on average 4.7407407407407405) internal successors, (256), 54 states have internal predecessors, (256), 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) [2023-12-18 18:27:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:00,640 INFO L93 Difference]: Finished difference Result 368 states and 392 transitions. [2023-12-18 18:27:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-12-18 18:27:00,640 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.7407407407407405) internal successors, (256), 54 states have internal predecessors, (256), 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 141 [2023-12-18 18:27:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:00,641 INFO L225 Difference]: With dead ends: 368 [2023-12-18 18:27:00,641 INFO L226 Difference]: Without dead ends: 366 [2023-12-18 18:27:00,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1660, Invalid=25072, Unknown=0, NotChecked=0, Total=26732 [2023-12-18 18:27:00,642 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 241 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 5952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 5778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:00,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 707 Invalid, 5952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 18:27:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-12-18 18:27:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 198. [2023-12-18 18:27:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0507614213197969) internal successors, (207), 197 states have internal predecessors, (207), 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) [2023-12-18 18:27:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 207 transitions. [2023-12-18 18:27:00,691 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 207 transitions. Word has length 141 [2023-12-18 18:27:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 207 transitions. [2023-12-18 18:27:00,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.7407407407407405) internal successors, (256), 54 states have internal predecessors, (256), 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) [2023-12-18 18:27:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 207 transitions. [2023-12-18 18:27:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-18 18:27:00,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:00,693 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:00,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-18 18:27:00,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:00,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -690023387, now seen corresponding path program 20 times [2023-12-18 18:27:00,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:00,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362867001] [2023-12-18 18:27:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 588 proven. 98 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:27:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362867001] [2023-12-18 18:27:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362867001] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968365299] [2023-12-18 18:27:01,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:27:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:01,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:01,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 18:27:01,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:27:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:01,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-18 18:27:01,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 664 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:27:03,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 664 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-18 18:27:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968365299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:03,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 76 [2023-12-18 18:27:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786282717] [2023-12-18 18:27:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:03,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-12-18 18:27:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:03,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-12-18 18:27:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=4310, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 18:27:03,795 INFO L87 Difference]: Start difference. First operand 198 states and 207 transitions. Second operand has 76 states, 76 states have (on average 4.565789473684211) internal successors, (347), 76 states have internal predecessors, (347), 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) [2023-12-18 18:27:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:04,576 INFO L93 Difference]: Finished difference Result 303 states and 315 transitions. [2023-12-18 18:27:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 18:27:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.565789473684211) internal successors, (347), 76 states have internal predecessors, (347), 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 146 [2023-12-18 18:27:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:04,577 INFO L225 Difference]: With dead ends: 303 [2023-12-18 18:27:04,577 INFO L226 Difference]: Without dead ends: 167 [2023-12-18 18:27:04,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1671, Invalid=5469, Unknown=0, NotChecked=0, Total=7140 [2023-12-18 18:27:04,578 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 480 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:04,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 458 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 18:27:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-18 18:27:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2023-12-18 18:27:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 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) [2023-12-18 18:27:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2023-12-18 18:27:04,619 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 146 [2023-12-18 18:27:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:04,619 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2023-12-18 18:27:04,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.565789473684211) internal successors, (347), 76 states have internal predecessors, (347), 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) [2023-12-18 18:27:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2023-12-18 18:27:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-18 18:27:04,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:04,620 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-18 18:27:04,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:04,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash 531942150, now seen corresponding path program 21 times [2023-12-18 18:27:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120773795] [2023-12-18 18:27:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 32 proven. 667 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-18 18:27:09,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:09,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120773795] [2023-12-18 18:27:09,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120773795] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:09,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895209466] [2023-12-18 18:27:09,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:27:09,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:09,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:09,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 18:27:19,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-18 18:27:19,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:19,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-18 18:27:19,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:19,651 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 16 treesize of output 12 [2023-12-18 18:27:19,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:19,695 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 72 treesize of output 40 [2023-12-18 18:27:19,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-18 18:27:19,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:19,799 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 72 treesize of output 40 [2023-12-18 18:27:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 138 proven. 627 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-18 18:27:20,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:27:22,123 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 107 treesize of output 97 [2023-12-18 18:27:22,126 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 [2023-12-18 18:27:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 129 proven. 636 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-18 18:27:23,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895209466] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:27:23,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:27:23,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 40, 40] total 103 [2023-12-18 18:27:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76601117] [2023-12-18 18:27:23,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:27:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-12-18 18:27:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:27:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-12-18 18:27:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=9714, Unknown=0, NotChecked=0, Total=10506 [2023-12-18 18:27:23,574 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 103 states, 103 states have (on average 3.796116504854369) internal successors, (391), 103 states have internal predecessors, (391), 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) [2023-12-18 18:27:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:27:52,328 INFO L93 Difference]: Finished difference Result 832 states and 899 transitions. [2023-12-18 18:27:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2023-12-18 18:27:52,329 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.796116504854369) internal successors, (391), 103 states have internal predecessors, (391), 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 158 [2023-12-18 18:27:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:27:52,330 INFO L225 Difference]: With dead ends: 832 [2023-12-18 18:27:52,330 INFO L226 Difference]: Without dead ends: 708 [2023-12-18 18:27:52,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 264 SyntacticMatches, 10 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48511 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=10875, Invalid=138507, Unknown=0, NotChecked=0, Total=149382 [2023-12-18 18:27:52,338 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 4857 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 13654 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4857 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 15462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 13654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:27:52,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4857 Valid, 1785 Invalid, 15462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 13654 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-18 18:27:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-12-18 18:27:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 224. [2023-12-18 18:27:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0403587443946187) internal successors, (232), 223 states have internal predecessors, (232), 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) [2023-12-18 18:27:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2023-12-18 18:27:52,430 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 158 [2023-12-18 18:27:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:27:52,430 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2023-12-18 18:27:52,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.796116504854369) internal successors, (391), 103 states have internal predecessors, (391), 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) [2023-12-18 18:27:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2023-12-18 18:27:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-18 18:27:52,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:27:52,431 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:27:52,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 18:27:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-18 18:27:52,631 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:27:52,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:27:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -767477130, now seen corresponding path program 22 times [2023-12-18 18:27:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:27:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625213143] [2023-12-18 18:27:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:27:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:27:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:27:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 49 proven. 839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:27:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:27:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625213143] [2023-12-18 18:27:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625213143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:27:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532190929] [2023-12-18 18:27:57,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:27:57,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:27:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:27:57,337 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:27:57,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 18:27:57,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:27:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:27:57,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 152 conjunts are in the unsatisfiable core [2023-12-18 18:27:57,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:27:58,074 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 [2023-12-18 18:27:58,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:27:58,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:27:58,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:27:58,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:27:58,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2023-12-18 18:27:58,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 18 [2023-12-18 18:27:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:27:58,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 18:27:58,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 18:27:58,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-18 18:27:58,783 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 18:27:58,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 47 [2023-12-18 18:27:58,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:27:58,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:27:58,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2023-12-18 18:27:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:27:58,964 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 18:27:58,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 83 treesize of output 61 [2023-12-18 18:28:03,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:28:03,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-12-18 18:28:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:28:03,317 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 18:28:03,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 94 treesize of output 75 [2023-12-18 18:28:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 44 proven. 841 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:28:13,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-18 18:37:03,703 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 [2023-12-18 18:37:03,704 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:37:04,029 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:37:04,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-18 18:37:04,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:37:04,230 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 164 with TraceHistMax 18,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 130 known predicates. [2023-12-18 18:37:04,233 INFO L445 BasicCegarLoop]: Path program histogram: [22, 1, 1, 1, 1, 1] [2023-12-18 18:37:04,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:37:04,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:37:04 BoogieIcfgContainer [2023-12-18 18:37:04,236 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:37:04,236 INFO L158 Benchmark]: Toolchain (without parser) took 851240.20ms. Allocated memory was 187.7MB in the beginning and 846.2MB in the end (delta: 658.5MB). Free memory was 149.2MB in the beginning and 371.6MB in the end (delta: -222.4MB). Peak memory consumption was 437.4MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,236 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 144.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:37:04,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.65ms. Allocated memory is still 187.7MB. Free memory was 148.9MB in the beginning and 136.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,236 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.78ms. Allocated memory is still 187.7MB. Free memory was 136.3MB in the beginning and 134.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,236 INFO L158 Benchmark]: Boogie Preprocessor took 31.04ms. Allocated memory is still 187.7MB. Free memory was 134.2MB in the beginning and 131.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,236 INFO L158 Benchmark]: RCFGBuilder took 379.41ms. Allocated memory is still 187.7MB. Free memory was 131.4MB in the beginning and 114.3MB in the end (delta: 17.1MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,240 INFO L158 Benchmark]: TraceAbstraction took 850582.49ms. Allocated memory was 187.7MB in the beginning and 846.2MB in the end (delta: 658.5MB). Free memory was 113.6MB in the beginning and 371.6MB in the end (delta: -258.0MB). Peak memory consumption was 401.8MB. Max. memory is 8.0GB. [2023-12-18 18:37:04,240 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 144.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.65ms. Allocated memory is still 187.7MB. Free memory was 148.9MB in the beginning and 136.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 38.78ms. Allocated memory is still 187.7MB. Free memory was 136.3MB in the beginning and 134.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.04ms. Allocated memory is still 187.7MB. Free memory was 134.2MB in the beginning and 131.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 379.41ms. Allocated memory is still 187.7MB. Free memory was 131.4MB in the beginning and 114.3MB in the end (delta: 17.1MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 850582.49ms. Allocated memory was 187.7MB in the beginning and 846.2MB in the end (delta: 658.5MB). Free memory was 113.6MB in the beginning and 371.6MB in the end (delta: -258.0MB). Peak memory consumption was 401.8MB. 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 analyzing trace of length 164 with TraceHistMax 18,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 130 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 850.5s, OverallIterations: 27, TraceHistogramMax: 18, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 127.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23884 SdHoareTripleChecker+Valid, 41.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23884 mSDsluCounter, 12770 SdHoareTripleChecker+Invalid, 36.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11859 mSDsCounter, 10112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 80952 IncrementalHoareTripleChecker+Invalid, 91064 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10112 mSolverCounterUnsat, 911 mSDtfsCounter, 80952 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6093 GetRequests, 3354 SyntacticMatches, 117 SemanticMatches, 2622 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 188931 ImplicationChecksByTransitivity, 178.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=26, InterpolantAutomatonStates: 1706, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 26 MinimizatonAttempts, 3169 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 28.7s SatisfiabilityAnalysisTime, 135.3s InterpolantComputationTime, 4044 NumberOfCodeBlocks, 4044 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 5954 ConstructedInterpolants, 66 QuantifiedInterpolants, 108386 SizeOfPredicates, 231 NumberOfNonLiveVariables, 8057 ConjunctsInSsa, 1121 ConjunctsInUnsatCore, 70 InterpolantComputations, 4 PerfectInterpolantSequences, 5728/18634 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