/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:44:56,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:44:56,610 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 08:44:56,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:44:56,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:44:56,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:44:56,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:44:56,643 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:44:56,644 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:44:56,647 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:44:56,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:44:56,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:44:56,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:44:56,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:44:56,650 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:44:56,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:44:56,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:44:56,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:44:56,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:44:56,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:44:56,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:44:56,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:44:56,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:44:56,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:44:56,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:44:56,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:44:56,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:44:56,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:44:56,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:44:56,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:44:56,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:44:56,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:44:56,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:44:56,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:44:56,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:44:56,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:44:56,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:44:56,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:44:56,657 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:44:56,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:44:56,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:44:56,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:44:56,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:44:56,924 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:44:56,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2023-12-20 08:44:58,047 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:44:58,227 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:44:58,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c [2023-12-20 08:44:58,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d015ef46b/48d79dcabd0b4d7db326340c0326f3e7/FLAG73bc45e2b [2023-12-20 08:44:58,252 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d015ef46b/48d79dcabd0b4d7db326340c0326f3e7 [2023-12-20 08:44:58,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:44:58,255 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:44:58,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:44:58,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:44:58,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:44:58,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b53f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58, skipping insertion in model container [2023-12-20 08:44:58,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,280 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:44:58,410 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-crafted/zero_sum2.c[400,413] [2023-12-20 08:44:58,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:44:58,433 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:44:58,444 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-crafted/zero_sum2.c[400,413] [2023-12-20 08:44:58,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:44:58,461 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:44:58,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58 WrapperNode [2023-12-20 08:44:58,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:44:58,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:44:58,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:44:58,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:44:58,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,493 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-12-20 08:44:58,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:44:58,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:44:58,494 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:44:58,494 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:44:58,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,505 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,521 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-20 08:44:58,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,526 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:44:58,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:44:58,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:44:58,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:44:58,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (1/1) ... [2023-12-20 08:44:58,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:44:58,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:44:58,585 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) [2023-12-20 08:44:58,608 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 [2023-12-20 08:44:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:44:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:44:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:44:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 08:44:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:44:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:44:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:44:58,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:44:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:44:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:44:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 08:44:58,710 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:44:58,712 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:44:58,908 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:44:58,953 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:44:58,953 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-20 08:44:58,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:44:58 BoogieIcfgContainer [2023-12-20 08:44:58,954 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:44:58,956 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:44:58,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:44:58,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:44:58,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:44:58" (1/3) ... [2023-12-20 08:44:58,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c9eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:44:58, skipping insertion in model container [2023-12-20 08:44:58,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:44:58" (2/3) ... [2023-12-20 08:44:58,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4c9eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:44:58, skipping insertion in model container [2023-12-20 08:44:58,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:44:58" (3/3) ... [2023-12-20 08:44:58,962 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2023-12-20 08:44:58,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:44:58,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:44:59,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:44:59,030 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;@510a6e90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:44:59,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:44:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 08:44:59,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:44:59,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:44:59,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:44:59,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:44:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1123727691, now seen corresponding path program 1 times [2023-12-20 08:44:59,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:44:59,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41123307] [2023-12-20 08:44:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:44:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:44:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:44:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:44:59,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:44:59,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41123307] [2023-12-20 08:44:59,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41123307] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:44:59,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:44:59,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 08:44:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866727990] [2023-12-20 08:44:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:44:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:44:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:44:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:44:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:44:59,210 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:44:59,247 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-12-20 08:44:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:44:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-20 08:44:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:44:59,254 INFO L225 Difference]: With dead ends: 33 [2023-12-20 08:44:59,255 INFO L226 Difference]: Without dead ends: 15 [2023-12-20 08:44:59,257 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 [2023-12-20 08:44:59,259 INFO L413 NwaCegarLoop]: 16 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, 16 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 [2023-12-20 08:44:59,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:44:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-20 08:44:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-20 08:44:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-12-20 08:44:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-12-20 08:44:59,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 14 [2023-12-20 08:44:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:44:59,294 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-12-20 08:44:59,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-12-20 08:44:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 08:44:59,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:44:59,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:44:59,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 08:44:59,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:44:59,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:44:59,298 INFO L85 PathProgramCache]: Analyzing trace with hash 349231377, now seen corresponding path program 1 times [2023-12-20 08:44:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:44:59,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661033983] [2023-12-20 08:44:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:44:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:44:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:44:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:44:59,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:44:59,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661033983] [2023-12-20 08:44:59,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661033983] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:44:59,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:44:59,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 08:44:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636305797] [2023-12-20 08:44:59,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:44:59,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:44:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:44:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:44:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:44:59,452 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:44:59,482 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-12-20 08:44:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:44:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-20 08:44:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:44:59,483 INFO L225 Difference]: With dead ends: 28 [2023-12-20 08:44:59,483 INFO L226 Difference]: Without dead ends: 16 [2023-12-20 08:44:59,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:44:59,485 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:44:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:44:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-20 08:44:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-20 08:44:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-20 08:44:59,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2023-12-20 08:44:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:44:59,495 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-20 08:44:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:44:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-20 08:44:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 08:44:59,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:44:59,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:44:59,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 08:44:59,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:44:59,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:44:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 261767879, now seen corresponding path program 1 times [2023-12-20 08:44:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:44:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416626799] [2023-12-20 08:44:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:44:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:44:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:44:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:44:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:44:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416626799] [2023-12-20 08:44:59,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416626799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:44:59,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:44:59,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 08:44:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561112354] [2023-12-20 08:44:59,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:44:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 08:44:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:44:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 08:44:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:44:59,600 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-12-20 08:44:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:44:59,643 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-12-20 08:44:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:44:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2023-12-20 08:44:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:44:59,646 INFO L225 Difference]: With dead ends: 30 [2023-12-20 08:44:59,646 INFO L226 Difference]: Without dead ends: 20 [2023-12-20 08:44:59,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:44:59,651 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:44:59,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:44:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-20 08:44:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-20 08:44:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-12-20 08:44:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 08:44:59,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2023-12-20 08:44:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:44:59,663 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 08:44:59,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-12-20 08:44:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 08:44:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 08:44:59,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:44:59,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:44:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 08:44:59,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:44:59,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:44:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1326628341, now seen corresponding path program 1 times [2023-12-20 08:44:59,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:44:59,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116969403] [2023-12-20 08:44:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:44:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:44:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:44:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 08:44:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:44:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116969403] [2023-12-20 08:44:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116969403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:44:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365188089] [2023-12-20 08:44:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:44:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:44:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:44:59,798 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) [2023-12-20 08:44:59,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 08:44:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:44:59,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:44:59,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:44:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 08:44:59,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:44:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 08:44:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365188089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:44:59,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:44:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-20 08:44:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362792416] [2023-12-20 08:44:59,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:44:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:44:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:44:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:44:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:44:59,957 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-12-20 08:45:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:00,002 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-12-20 08:45:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:45:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 19 [2023-12-20 08:45:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:00,004 INFO L225 Difference]: With dead ends: 37 [2023-12-20 08:45:00,004 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 08:45:00,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:45:00,009 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:00,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:45:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 08:45:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 08:45:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-20 08:45:00,016 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2023-12-20 08:45:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:00,017 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-20 08:45:00,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-12-20 08:45:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-20 08:45:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 08:45:00,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:00,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:00,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 08:45:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:00,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1865382421, now seen corresponding path program 2 times [2023-12-20 08:45:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545251423] [2023-12-20 08:45:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:45:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545251423] [2023-12-20 08:45:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545251423] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456559376] [2023-12-20 08:45:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:45:00,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:00,345 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) [2023-12-20 08:45:00,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 08:45:00,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:45:00,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:00,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:45:00,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:45:00,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:45:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456559376] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:00,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:00,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-20 08:45:00,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559167828] [2023-12-20 08:45:00,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 08:45:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 08:45:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:45:00,489 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-12-20 08:45:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:00,547 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-20 08:45:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 08:45:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 08:45:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:00,548 INFO L225 Difference]: With dead ends: 38 [2023-12-20 08:45:00,548 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 08:45:00,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:45:00,549 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:00,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:45:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 08:45:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-20 08:45:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-20 08:45:00,560 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-12-20 08:45:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-20 08:45:00,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2023-12-20 08:45:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-20 08:45:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 08:45:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:00,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:00,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:00,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:00,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash 909538577, now seen corresponding path program 3 times [2023-12-20 08:45:00,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374291206] [2023-12-20 08:45:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374291206] [2023-12-20 08:45:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374291206] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010258042] [2023-12-20 08:45:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:45:01,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:01,953 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) [2023-12-20 08:45:01,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 08:45:02,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 08:45:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:02,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 08:45:02,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:02,075 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 [2023-12-20 08:45:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:02,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:45:02,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010258042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:02,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:02,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-12-20 08:45:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913497655] [2023-12-20 08:45:02,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:02,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 08:45:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 08:45:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:45:02,321 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:02,532 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-12-20 08:45:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:45:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-20 08:45:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:02,533 INFO L225 Difference]: With dead ends: 42 [2023-12-20 08:45:02,533 INFO L226 Difference]: Without dead ends: 38 [2023-12-20 08:45:02,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-20 08:45:02,534 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:02,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 93 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:45:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-20 08:45:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-12-20 08:45:02,540 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) [2023-12-20 08:45:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-12-20 08:45:02,541 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2023-12-20 08:45:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:02,541 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-12-20 08:45:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-12-20 08:45:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 08:45:02,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:02,543 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:02,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:02,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:02,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:02,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1120376093, now seen corresponding path program 4 times [2023-12-20 08:45:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:02,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723690110] [2023-12-20 08:45:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:02,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 08:45:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723690110] [2023-12-20 08:45:02,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723690110] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777944951] [2023-12-20 08:45:02,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:45:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:02,862 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) [2023-12-20 08:45:02,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 08:45:02,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:45:02,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:02,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:45:02,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 08:45:02,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 08:45:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777944951] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:03,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:03,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-12-20 08:45:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574708196] [2023-12-20 08:45:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:03,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 08:45:03,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 08:45:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-12-20 08:45:03,033 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:03,175 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-12-20 08:45:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:45:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-20 08:45:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:03,176 INFO L225 Difference]: With dead ends: 81 [2023-12-20 08:45:03,176 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 08:45:03,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:45:03,177 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:03,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 08:45:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-12-20 08:45:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2023-12-20 08:45:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-12-20 08:45:03,183 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2023-12-20 08:45:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:03,183 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-12-20 08:45:03,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-12-20 08:45:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 08:45:03,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:03,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:03,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:03,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -209725766, now seen corresponding path program 5 times [2023-12-20 08:45:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422872911] [2023-12-20 08:45:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:45:03,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422872911] [2023-12-20 08:45:03,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422872911] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737579971] [2023-12-20 08:45:03,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:45:03,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:03,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:03,486 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) [2023-12-20 08:45:03,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 08:45:03,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-20 08:45:03,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:03,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:45:03,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:45:03,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:45:03,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737579971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:03,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:03,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 08:45:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195780076] [2023-12-20 08:45:03,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:03,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 08:45:03,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 08:45:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-20 08:45:03,688 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2023-12-20 08:45:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:03,752 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-12-20 08:45:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 08:45:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 26 [2023-12-20 08:45:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:03,754 INFO L225 Difference]: With dead ends: 42 [2023-12-20 08:45:03,755 INFO L226 Difference]: Without dead ends: 30 [2023-12-20 08:45:03,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-12-20 08:45:03,756 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:03,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:45:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-20 08:45:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-20 08:45:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2023-12-20 08:45:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-12-20 08:45:03,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2023-12-20 08:45:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:03,763 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-12-20 08:45:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2023-12-20 08:45:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-12-20 08:45:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 08:45:03,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:03,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:03,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:03,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:03,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -360312821, now seen corresponding path program 6 times [2023-12-20 08:45:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387695944] [2023-12-20 08:45:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:05,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387695944] [2023-12-20 08:45:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387695944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:05,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764570158] [2023-12-20 08:45:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:45:05,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:05,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:05,203 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) [2023-12-20 08:45:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 08:45:05,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-20 08:45:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:05,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-20 08:45:05,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:45:05,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:05,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:05,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-12-20 08:45:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:45:05,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764570158] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:05,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:05,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 38 [2023-12-20 08:45:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131227676] [2023-12-20 08:45:05,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:05,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:45:05,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:05,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:45:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:45:05,970 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:06,489 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-12-20 08:45:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:45:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-20 08:45:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:06,490 INFO L225 Difference]: With dead ends: 50 [2023-12-20 08:45:06,490 INFO L226 Difference]: Without dead ends: 46 [2023-12-20 08:45:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 08:45:06,492 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:06,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 87 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:45:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-20 08:45:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-12-20 08:45:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2023-12-20 08:45:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-12-20 08:45:06,498 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2023-12-20 08:45:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:06,498 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-12-20 08:45:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-12-20 08:45:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 08:45:06,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:06,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:06,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:06,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:06,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:06,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1171913621, now seen corresponding path program 7 times [2023-12-20 08:45:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:06,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009808996] [2023-12-20 08:45:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:06,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:45:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009808996] [2023-12-20 08:45:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009808996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919588222] [2023-12-20 08:45:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:45:06,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:06,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:06,806 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) [2023-12-20 08:45:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 08:45:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:06,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:45:06,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:45:06,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 08:45:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919588222] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:06,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:06,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:45:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927870979] [2023-12-20 08:45:06,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:45:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:45:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:45:06,986 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2023-12-20 08:45:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:07,097 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2023-12-20 08:45:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 08:45:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 [2023-12-20 08:45:07,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:07,098 INFO L225 Difference]: With dead ends: 84 [2023-12-20 08:45:07,098 INFO L226 Difference]: Without dead ends: 44 [2023-12-20 08:45:07,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:45:07,099 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:07,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 36 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-20 08:45:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-20 08:45:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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) [2023-12-20 08:45:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-12-20 08:45:07,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 30 [2023-12-20 08:45:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:07,105 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-12-20 08:45:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2023-12-20 08:45:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-12-20 08:45:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 08:45:07,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:07,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:07,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:07,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:07,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:07,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash 130105889, now seen corresponding path program 8 times [2023-12-20 08:45:07,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:07,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168354711] [2023-12-20 08:45:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:07,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 08:45:07,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:07,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168354711] [2023-12-20 08:45:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168354711] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230582358] [2023-12-20 08:45:07,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:45:07,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:07,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:07,436 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) [2023-12-20 08:45:07,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 08:45:07,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:45:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:07,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:45:07,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 08:45:07,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 08:45:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230582358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:07,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:45:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321636928] [2023-12-20 08:45:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:45:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:45:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:45:07,634 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2023-12-20 08:45:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:07,714 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-12-20 08:45:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 08:45:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 31 [2023-12-20 08:45:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:07,715 INFO L225 Difference]: With dead ends: 62 [2023-12-20 08:45:07,715 INFO L226 Difference]: Without dead ends: 35 [2023-12-20 08:45:07,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-20 08:45:07,716 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:07,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-20 08:45:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-20 08:45:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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) [2023-12-20 08:45:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-20 08:45:07,721 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2023-12-20 08:45:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:07,721 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-20 08:45:07,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2023-12-20 08:45:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-20 08:45:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 08:45:07,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:07,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:07,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:07,928 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,SelfDestructingSolverStorable10 [2023-12-20 08:45:07,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:07,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1688059631, now seen corresponding path program 9 times [2023-12-20 08:45:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:07,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212722877] [2023-12-20 08:45:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:09,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212722877] [2023-12-20 08:45:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212722877] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126224120] [2023-12-20 08:45:09,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:45:09,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:09,837 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) [2023-12-20 08:45:09,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 08:45:09,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 08:45:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:09,915 WARN L260 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-20 08:45:09,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:10,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:10,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-20 08:45:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:10,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:11,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:11,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 111 [2023-12-20 08:45:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:12,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126224120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:12,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:12,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 31] total 74 [2023-12-20 08:45:12,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119708758] [2023-12-20 08:45:12,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:12,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-20 08:45:12,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-20 08:45:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=5027, Unknown=0, NotChecked=0, Total=5402 [2023-12-20 08:45:12,739 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 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) [2023-12-20 08:45:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:14,970 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-12-20 08:45:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-20 08:45:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 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 34 [2023-12-20 08:45:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:14,972 INFO L225 Difference]: With dead ends: 88 [2023-12-20 08:45:14,972 INFO L226 Difference]: Without dead ends: 82 [2023-12-20 08:45:14,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=739, Invalid=8963, Unknown=0, NotChecked=0, Total=9702 [2023-12-20 08:45:14,974 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:14,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 08:45:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-20 08:45:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2023-12-20 08:45:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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) [2023-12-20 08:45:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-12-20 08:45:14,985 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2023-12-20 08:45:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:14,986 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-12-20 08:45:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 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) [2023-12-20 08:45:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-12-20 08:45:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 08:45:14,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:14,987 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:14,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:15,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:15,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:15,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1559355427, now seen corresponding path program 10 times [2023-12-20 08:45:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261183643] [2023-12-20 08:45:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:45:15,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261183643] [2023-12-20 08:45:15,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261183643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:15,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108275907] [2023-12-20 08:45:15,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:45:15,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:15,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:45:15,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 08:45:15,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:45:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:15,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:45:15,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:45:15,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 08:45:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108275907] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:15,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-20 08:45:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913905194] [2023-12-20 08:45:15,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-20 08:45:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-20 08:45:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-20 08:45:15,657 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 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) [2023-12-20 08:45:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:15,862 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2023-12-20 08:45:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:45:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-20 08:45:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:15,863 INFO L225 Difference]: With dead ends: 109 [2023-12-20 08:45:15,863 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 08:45:15,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-12-20 08:45:15,864 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:15,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 42 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 08:45:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2023-12-20 08:45:15,878 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) [2023-12-20 08:45:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-12-20 08:45:15,878 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2023-12-20 08:45:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:15,878 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-12-20 08:45:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 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) [2023-12-20 08:45:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-12-20 08:45:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 08:45:15,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:15,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:15,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:16,088 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,SelfDestructingSolverStorable12 [2023-12-20 08:45:16,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:16,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash 230767034, now seen corresponding path program 11 times [2023-12-20 08:45:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218519444] [2023-12-20 08:45:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:16,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 08:45:16,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218519444] [2023-12-20 08:45:16,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218519444] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706949478] [2023-12-20 08:45:16,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:45:16,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:16,240 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) [2023-12-20 08:45:16,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 08:45:16,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 08:45:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:16,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:45:16,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 08:45:16,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 08:45:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706949478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:16,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 08:45:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210619425] [2023-12-20 08:45:16,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:16,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 08:45:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 08:45:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-12-20 08:45:16,544 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2023-12-20 08:45:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:16,628 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-12-20 08:45:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:45:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-20 08:45:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:16,629 INFO L225 Difference]: With dead ends: 56 [2023-12-20 08:45:16,629 INFO L226 Difference]: Without dead ends: 40 [2023-12-20 08:45:16,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-12-20 08:45:16,630 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:16,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-20 08:45:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-20 08:45:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-12-20 08:45:16,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2023-12-20 08:45:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-12-20 08:45:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2023-12-20 08:45:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-12-20 08:45:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 08:45:16,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:16,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:16,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:16,843 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,SelfDestructingSolverStorable13 [2023-12-20 08:45:16,844 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:16,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 167456267, now seen corresponding path program 12 times [2023-12-20 08:45:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266723109] [2023-12-20 08:45:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:19,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:19,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266723109] [2023-12-20 08:45:19,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266723109] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:19,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202745243] [2023-12-20 08:45:19,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:45:19,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:19,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:19,381 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) [2023-12-20 08:45:19,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 08:45:19,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 08:45:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:19,467 WARN L260 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-20 08:45:19,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:19,498 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 [2023-12-20 08:45:20,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:45:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:45:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:45:20,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:20,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-12-20 08:45:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:45:20,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:45:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202745243] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:22,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 33] total 89 [2023-12-20 08:45:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223140528] [2023-12-20 08:45:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-20 08:45:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-20 08:45:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=7219, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 08:45:22,598 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 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) [2023-12-20 08:45:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:25,892 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-12-20 08:45:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-20 08:45:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 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) Word has length 39 [2023-12-20 08:45:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:25,893 INFO L225 Difference]: With dead ends: 71 [2023-12-20 08:45:25,893 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 08:45:25,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1198, Invalid=13322, Unknown=0, NotChecked=0, Total=14520 [2023-12-20 08:45:25,897 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:25,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 114 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 08:45:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 08:45:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2023-12-20 08:45:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 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) [2023-12-20 08:45:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-20 08:45:25,910 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 39 [2023-12-20 08:45:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:25,910 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-20 08:45:25,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 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) [2023-12-20 08:45:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-20 08:45:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 08:45:25,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:25,911 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:25,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:26,112 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,SelfDestructingSolverStorable14 [2023-12-20 08:45:26,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:26,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1004601131, now seen corresponding path program 13 times [2023-12-20 08:45:26,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:26,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165766733] [2023-12-20 08:45:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:26,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:45:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165766733] [2023-12-20 08:45:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165766733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447727507] [2023-12-20 08:45:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:45:26,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:26,285 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) [2023-12-20 08:45:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 08:45:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:26,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 08:45:26,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:45:26,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:45:26,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447727507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:26,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:26,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 08:45:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900718079] [2023-12-20 08:45:26,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:26,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:45:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:45:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:45:26,563 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-20 08:45:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:26,692 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2023-12-20 08:45:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 08:45:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) Word has length 40 [2023-12-20 08:45:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:26,693 INFO L225 Difference]: With dead ends: 117 [2023-12-20 08:45:26,694 INFO L226 Difference]: Without dead ends: 63 [2023-12-20 08:45:26,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-12-20 08:45:26,695 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:26,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-20 08:45:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-20 08:45:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 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) [2023-12-20 08:45:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-12-20 08:45:26,709 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 40 [2023-12-20 08:45:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:26,709 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-12-20 08:45:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-20 08:45:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-12-20 08:45:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-20 08:45:26,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:26,710 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:26,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:26,916 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,SelfDestructingSolverStorable15 [2023-12-20 08:45:26,916 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:26,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash -588574367, now seen corresponding path program 14 times [2023-12-20 08:45:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:26,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947257015] [2023-12-20 08:45:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 08:45:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947257015] [2023-12-20 08:45:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947257015] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720902100] [2023-12-20 08:45:27,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:45:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:27,114 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) [2023-12-20 08:45:27,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 08:45:27,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:45:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:27,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 08:45:27,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 08:45:27,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 08:45:27,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720902100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:27,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:27,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 08:45:27,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785715430] [2023-12-20 08:45:27,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:45:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:45:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:45:27,365 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-20 08:45:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:27,470 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-12-20 08:45:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 08:45:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) Word has length 41 [2023-12-20 08:45:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:27,471 INFO L225 Difference]: With dead ends: 85 [2023-12-20 08:45:27,471 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 08:45:27,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-12-20 08:45:27,472 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:27,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 08:45:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-20 08:45:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 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) [2023-12-20 08:45:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-12-20 08:45:27,481 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2023-12-20 08:45:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:27,481 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-12-20 08:45:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-20 08:45:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-12-20 08:45:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 08:45:27,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:27,482 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:27,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:27,688 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:27,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash -422298351, now seen corresponding path program 15 times [2023-12-20 08:45:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229542754] [2023-12-20 08:45:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:30,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:30,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229542754] [2023-12-20 08:45:30,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229542754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:30,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941518611] [2023-12-20 08:45:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:45:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:30,547 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) [2023-12-20 08:45:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 08:45:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 08:45:30,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:30,665 WARN L260 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-20 08:45:30,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:30,742 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 [2023-12-20 08:45:30,778 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 [2023-12-20 08:45:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:45:31,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:31,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-20 08:45:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:31,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:45:32,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941518611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:32,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:32,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28, 20] total 78 [2023-12-20 08:45:32,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006627578] [2023-12-20 08:45:32,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:32,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-20 08:45:32,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:32,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-20 08:45:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5506, Unknown=0, NotChecked=0, Total=6006 [2023-12-20 08:45:32,880 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 78 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 78 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:36,093 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2023-12-20 08:45:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 08:45:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 78 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 08:45:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:36,094 INFO L225 Difference]: With dead ends: 112 [2023-12-20 08:45:36,094 INFO L226 Difference]: Without dead ends: 106 [2023-12-20 08:45:36,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1052, Invalid=12288, Unknown=0, NotChecked=0, Total=13340 [2023-12-20 08:45:36,097 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:36,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 166 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 08:45:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-20 08:45:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2023-12-20 08:45:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.126984126984127) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-12-20 08:45:36,117 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 44 [2023-12-20 08:45:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:36,118 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-12-20 08:45:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 78 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-12-20 08:45:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-20 08:45:36,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:36,119 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:36,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 08:45:36,324 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:36,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash 587830627, now seen corresponding path program 16 times [2023-12-20 08:45:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151253853] [2023-12-20 08:45:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-20 08:45:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151253853] [2023-12-20 08:45:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151253853] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:36,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896580482] [2023-12-20 08:45:36,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:45:36,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:36,547 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) [2023-12-20 08:45:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 08:45:36,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:45:36,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:36,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:45:36,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-20 08:45:36,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-20 08:45:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896580482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:36,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-12-20 08:45:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114846210] [2023-12-20 08:45:36,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:36,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 08:45:36,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 08:45:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:45:36,933 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 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) [2023-12-20 08:45:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:37,219 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2023-12-20 08:45:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 08:45:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-20 08:45:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:37,219 INFO L225 Difference]: With dead ends: 137 [2023-12-20 08:45:37,220 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 08:45:37,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:45:37,220 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:37,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 72 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:45:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 08:45:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2023-12-20 08:45:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-12-20 08:45:37,238 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 45 [2023-12-20 08:45:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:37,238 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-12-20 08:45:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 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) [2023-12-20 08:45:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-12-20 08:45:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 08:45:37,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:37,239 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:37,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:37,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:37,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:37,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash 56478906, now seen corresponding path program 17 times [2023-12-20 08:45:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:37,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273362721] [2023-12-20 08:45:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:37,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-20 08:45:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273362721] [2023-12-20 08:45:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273362721] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133869655] [2023-12-20 08:45:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:45:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:37,653 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) [2023-12-20 08:45:37,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 08:45:37,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 08:45:37,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:37,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:45:37,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-20 08:45:37,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-20 08:45:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133869655] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:38,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:38,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 08:45:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218658653] [2023-12-20 08:45:38,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 08:45:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 08:45:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-12-20 08:45:38,103 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2023-12-20 08:45:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:38,210 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-12-20 08:45:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 08:45:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-20 08:45:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:38,211 INFO L225 Difference]: With dead ends: 70 [2023-12-20 08:45:38,211 INFO L226 Difference]: Without dead ends: 50 [2023-12-20 08:45:38,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-12-20 08:45:38,211 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:38,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-20 08:45:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-20 08:45:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-20 08:45:38,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 46 [2023-12-20 08:45:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:38,224 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-20 08:45:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2023-12-20 08:45:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-20 08:45:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 08:45:38,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:38,225 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:38,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-20 08:45:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:38,425 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:38,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -963863541, now seen corresponding path program 18 times [2023-12-20 08:45:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:38,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609674532] [2023-12-20 08:45:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:41,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609674532] [2023-12-20 08:45:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609674532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395077310] [2023-12-20 08:45:41,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:45:41,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:41,982 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) [2023-12-20 08:45:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 08:45:42,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 08:45:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:42,121 WARN L260 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 145 conjunts are in the unsatisfiable core [2023-12-20 08:45:42,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:42,276 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 [2023-12-20 08:45:43,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:43,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-20 08:45:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:43,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:46,744 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 116 treesize of output 100 [2023-12-20 08:45:46,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:45:46,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1122 treesize of output 674 [2023-12-20 08:45:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:45:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395077310] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:47,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:47,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 31, 48] total 114 [2023-12-20 08:45:47,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925527436] [2023-12-20 08:45:47,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:47,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-12-20 08:45:47,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:47,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-12-20 08:45:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=12088, Unknown=0, NotChecked=0, Total=12882 [2023-12-20 08:45:47,784 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 114 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 114 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:57,460 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2023-12-20 08:45:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-20 08:45:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 114 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-20 08:45:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:57,461 INFO L225 Difference]: With dead ends: 175 [2023-12-20 08:45:57,462 INFO L226 Difference]: Without dead ends: 167 [2023-12-20 08:45:57,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9591 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=2464, Invalid=30477, Unknown=1, NotChecked=0, Total=32942 [2023-12-20 08:45:57,464 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 3784 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 3784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:57,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 221 Invalid, 4212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 3784 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 08:45:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-20 08:45:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2023-12-20 08:45:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 104 states have internal predecessors, (122), 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) [2023-12-20 08:45:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2023-12-20 08:45:57,513 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 49 [2023-12-20 08:45:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:57,513 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2023-12-20 08:45:57,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 114 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2023-12-20 08:45:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 08:45:57,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:57,514 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:57,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:57,715 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:57,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash -156222997, now seen corresponding path program 19 times [2023-12-20 08:45:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:57,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086903085] [2023-12-20 08:45:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-20 08:45:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086903085] [2023-12-20 08:45:57,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086903085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151189079] [2023-12-20 08:45:57,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:45:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:57,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:57,933 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) [2023-12-20 08:45:57,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 08:45:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:58,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:45:58,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-20 08:45:58,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-20 08:45:58,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151189079] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:58,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:58,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-20 08:45:58,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833904246] [2023-12-20 08:45:58,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:45:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:45:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:45:58,396 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:58,607 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2023-12-20 08:45:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:45:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-20 08:45:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:58,608 INFO L225 Difference]: With dead ends: 167 [2023-12-20 08:45:58,608 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 08:45:58,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-12-20 08:45:58,609 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:58,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 08:45:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-12-20 08:45:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 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) [2023-12-20 08:45:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-12-20 08:45:58,645 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2023-12-20 08:45:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:58,645 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-12-20 08:45:58,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-12-20 08:45:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-20 08:45:58,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:58,646 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:58,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:58,848 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:58,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -804683615, now seen corresponding path program 20 times [2023-12-20 08:45:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868267159] [2023-12-20 08:45:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:58,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:45:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-20 08:45:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:45:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868267159] [2023-12-20 08:45:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868267159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:45:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054235729] [2023-12-20 08:45:59,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:45:59,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:45:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:45:59,057 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) [2023-12-20 08:45:59,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 08:45:59,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:45:59,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:45:59,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:45:59,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:45:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-20 08:45:59,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:45:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-20 08:45:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054235729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:45:59,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:45:59,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-20 08:45:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878350915] [2023-12-20 08:45:59,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:45:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:45:59,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:45:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:45:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:45:59,487 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:45:59,641 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2023-12-20 08:45:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:45:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-20 08:45:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:45:59,642 INFO L225 Difference]: With dead ends: 98 [2023-12-20 08:45:59,642 INFO L226 Difference]: Without dead ends: 55 [2023-12-20 08:45:59,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-20 08:45:59,643 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:45:59,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:45:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-20 08:45:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-20 08:45:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 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) [2023-12-20 08:45:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-20 08:45:59,659 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 51 [2023-12-20 08:45:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:45:59,659 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-20 08:45:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:45:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-20 08:45:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 08:45:59,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:45:59,660 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:45:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 08:45:59,860 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,SelfDestructingSolverStorable22 [2023-12-20 08:45:59,860 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:45:59,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:45:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash 638347537, now seen corresponding path program 21 times [2023-12-20 08:45:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:45:59,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566081532] [2023-12-20 08:45:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:45:59,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:45:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:46:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:46:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:46:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566081532] [2023-12-20 08:46:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566081532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:46:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269209885] [2023-12-20 08:46:04,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:46:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:46:04,023 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) [2023-12-20 08:46:04,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 08:46:04,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:46:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:46:04,141 WARN L260 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 164 conjunts are in the unsatisfiable core [2023-12-20 08:46:04,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:46:04,183 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 [2023-12-20 08:46:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:07,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:07,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:07,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:46:07,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-12-20 08:46:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:46:07,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:46:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:46:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269209885] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:46:11,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:46:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 46] total 129 [2023-12-20 08:46:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261886265] [2023-12-20 08:46:11,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:46:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-20 08:46:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:46:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-20 08:46:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=15374, Unknown=0, NotChecked=0, Total=16512 [2023-12-20 08:46:11,438 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 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) [2023-12-20 08:46:28,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:46:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:46:34,319 INFO L93 Difference]: Finished difference Result 168 states and 191 transitions. [2023-12-20 08:46:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-12-20 08:46:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-20 08:46:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:46:34,320 INFO L225 Difference]: With dead ends: 168 [2023-12-20 08:46:34,320 INFO L226 Difference]: Without dead ends: 160 [2023-12-20 08:46:34,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11586 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=3770, Invalid=44409, Unknown=1, NotChecked=0, Total=48180 [2023-12-20 08:46:34,323 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 181 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 530 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 4438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:46:34,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 274 Invalid, 4438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 3907 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2023-12-20 08:46:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-20 08:46:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 106. [2023-12-20 08:46:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:46:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2023-12-20 08:46:34,367 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 54 [2023-12-20 08:46:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:46:34,367 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2023-12-20 08:46:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 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) [2023-12-20 08:46:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2023-12-20 08:46:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 08:46:34,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:46:34,368 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:46:34,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 08:46:34,569 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,SelfDestructingSolverStorable23 [2023-12-20 08:46:34,569 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:46:34,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:46:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1186755933, now seen corresponding path program 22 times [2023-12-20 08:46:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:46:34,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576395856] [2023-12-20 08:46:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:46:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:46:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:46:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 08:46:34,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:46:34,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576395856] [2023-12-20 08:46:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576395856] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:46:34,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689626457] [2023-12-20 08:46:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:46:34,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:34,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:46:34,837 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) [2023-12-20 08:46:34,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 08:46:34,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:46:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:46:34,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:46:34,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:46:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 08:46:35,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:46:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-12-20 08:46:35,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689626457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:46:35,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:46:35,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2023-12-20 08:46:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828755220] [2023-12-20 08:46:35,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:46:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 08:46:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:46:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 08:46:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:46:35,550 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-12-20 08:46:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:46:35,982 INFO L93 Difference]: Finished difference Result 217 states and 246 transitions. [2023-12-20 08:46:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 08:46:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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 55 [2023-12-20 08:46:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:46:35,983 INFO L225 Difference]: With dead ends: 217 [2023-12-20 08:46:35,983 INFO L226 Difference]: Without dead ends: 101 [2023-12-20 08:46:35,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 74 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:46:35,984 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:46:35,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 45 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:46:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-20 08:46:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2023-12-20 08:46:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 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) [2023-12-20 08:46:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-12-20 08:46:36,028 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 55 [2023-12-20 08:46:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:46:36,028 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-12-20 08:46:36,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-12-20 08:46:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-12-20 08:46:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-20 08:46:36,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:46:36,029 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:46:36,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 08:46:36,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:36,230 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:46:36,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:46:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1855928602, now seen corresponding path program 23 times [2023-12-20 08:46:36,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:46:36,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592059449] [2023-12-20 08:46:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:46:36,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:46:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:46:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:46:36,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:46:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592059449] [2023-12-20 08:46:36,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592059449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:46:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484285505] [2023-12-20 08:46:36,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:46:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:46:36,526 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) [2023-12-20 08:46:36,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 08:46:36,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-20 08:46:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:46:36,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:46:36,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:46:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:46:37,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:46:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-20 08:46:37,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484285505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:46:37,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:46:37,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2023-12-20 08:46:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166737582] [2023-12-20 08:46:37,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:46:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 08:46:37,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:46:37,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 08:46:37,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:46:37,244 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-12-20 08:46:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:46:37,597 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-12-20 08:46:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 08:46:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-20 08:46:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:46:37,613 INFO L225 Difference]: With dead ends: 96 [2023-12-20 08:46:37,613 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 08:46:37,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:46:37,614 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:46:37,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:46:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 08:46:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-12-20 08:46:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 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) [2023-12-20 08:46:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-20 08:46:37,643 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2023-12-20 08:46:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:46:37,644 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-20 08:46:37,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-12-20 08:46:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-20 08:46:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 08:46:37,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:46:37,644 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:46:37,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 08:46:37,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:37,845 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:46:37,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:46:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash -864396789, now seen corresponding path program 24 times [2023-12-20 08:46:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:46:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766819135] [2023-12-20 08:46:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:46:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:46:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:46:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:46:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:46:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766819135] [2023-12-20 08:46:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766819135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:46:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507398165] [2023-12-20 08:46:43,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:46:43,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:46:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:46:43,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:46:43,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 08:46:43,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-20 08:46:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:46:43,941 WARN L260 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 181 conjunts are in the unsatisfiable core [2023-12-20 08:46:43,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:46:43,975 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 [2023-12-20 08:46:46,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:46:46,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:46:46,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 88 treesize of output 185 [2023-12-20 08:46:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 219 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:46:47,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:46:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 08:46:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507398165] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:46:51,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:46:51,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 47, 46] total 131 [2023-12-20 08:46:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824729552] [2023-12-20 08:46:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:46:51,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-12-20 08:46:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:46:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-12-20 08:46:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=15973, Unknown=0, NotChecked=0, Total=17030 [2023-12-20 08:46:51,986 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 131 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 131 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:47:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:07,875 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2023-12-20 08:47:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-20 08:47:07,876 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 131 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-20 08:47:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:07,877 INFO L225 Difference]: With dead ends: 170 [2023-12-20 08:47:07,877 INFO L226 Difference]: Without dead ends: 162 [2023-12-20 08:47:07,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9964 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3609, Invalid=44133, Unknown=0, NotChecked=0, Total=47742 [2023-12-20 08:47:07,879 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 4394 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 5022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 4394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:07,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 218 Invalid, 5022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 4394 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-20 08:47:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-20 08:47:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2023-12-20 08:47:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 113 states have internal predecessors, (130), 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) [2023-12-20 08:47:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2023-12-20 08:47:07,944 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 59 [2023-12-20 08:47:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:07,944 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2023-12-20 08:47:07,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 131 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:47:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2023-12-20 08:47:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 08:47:07,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:07,945 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:07,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 08:47:08,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 08:47:08,153 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:08,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash -997185204, now seen corresponding path program 25 times [2023-12-20 08:47:08,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:08,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245621207] [2023-12-20 08:47:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:08,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:47:08,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:08,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245621207] [2023-12-20 08:47:08,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245621207] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:08,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891261807] [2023-12-20 08:47:08,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:47:08,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:08,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:08,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:08,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 08:47:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:08,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:47:08,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:47:08,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:47:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891261807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:08,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:08,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 08:47:08,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330562661] [2023-12-20 08:47:08,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:08,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 08:47:08,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 08:47:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:47:08,950 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2023-12-20 08:47:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:09,237 INFO L93 Difference]: Finished difference Result 228 states and 260 transitions. [2023-12-20 08:47:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 08:47:09,237 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-20 08:47:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:09,238 INFO L225 Difference]: With dead ends: 228 [2023-12-20 08:47:09,238 INFO L226 Difference]: Without dead ends: 115 [2023-12-20 08:47:09,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:47:09,239 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:09,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:47:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-20 08:47:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-20 08:47:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 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) [2023-12-20 08:47:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2023-12-20 08:47:09,309 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 60 [2023-12-20 08:47:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:09,309 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2023-12-20 08:47:09,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2023-12-20 08:47:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2023-12-20 08:47:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 08:47:09,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:09,309 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:09,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 08:47:09,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 08:47:09,510 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:09,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash -434043774, now seen corresponding path program 26 times [2023-12-20 08:47:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:09,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620892955] [2023-12-20 08:47:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:09,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-20 08:47:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620892955] [2023-12-20 08:47:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620892955] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353726719] [2023-12-20 08:47:09,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:47:09,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:09,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:09,795 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:09,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 08:47:09,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:47:09,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:47:09,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:47:09,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-20 08:47:10,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-20 08:47:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353726719] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:10,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:10,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 08:47:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001675625] [2023-12-20 08:47:10,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:10,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 08:47:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 08:47:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:47:10,239 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2023-12-20 08:47:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:10,413 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2023-12-20 08:47:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 08:47:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-20 08:47:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:10,414 INFO L225 Difference]: With dead ends: 146 [2023-12-20 08:47:10,414 INFO L226 Difference]: Without dead ends: 80 [2023-12-20 08:47:10,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-12-20 08:47:10,415 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:10,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:47:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-20 08:47:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2023-12-20 08:47:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 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) [2023-12-20 08:47:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-12-20 08:47:10,451 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 61 [2023-12-20 08:47:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:10,451 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-12-20 08:47:10,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2023-12-20 08:47:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-12-20 08:47:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 08:47:10,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:10,451 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:10,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 08:47:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 08:47:10,652 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -779434735, now seen corresponding path program 27 times [2023-12-20 08:47:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:10,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057974867] [2023-12-20 08:47:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 6 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:47:16,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057974867] [2023-12-20 08:47:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057974867] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080888948] [2023-12-20 08:47:16,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:47:16,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:16,361 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:16,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 08:47:16,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 08:47:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:47:16,521 WARN L260 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 188 conjunts are in the unsatisfiable core [2023-12-20 08:47:16,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:16,550 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 [2023-12-20 08:47:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:18,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:47:18,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 93 [2023-12-20 08:47:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 220 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:47:18,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:47:22,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080888948] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:22,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:22,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 42, 39] total 124 [2023-12-20 08:47:22,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171065003] [2023-12-20 08:47:22,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:22,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-12-20 08:47:22,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-12-20 08:47:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=14183, Unknown=0, NotChecked=0, Total=15252 [2023-12-20 08:47:22,840 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 124 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 124 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) [2023-12-20 08:47:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:32,254 INFO L93 Difference]: Finished difference Result 185 states and 217 transitions. [2023-12-20 08:47:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-20 08:47:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 124 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 64 [2023-12-20 08:47:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:32,255 INFO L225 Difference]: With dead ends: 185 [2023-12-20 08:47:32,255 INFO L226 Difference]: Without dead ends: 164 [2023-12-20 08:47:32,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7408 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2464, Invalid=27986, Unknown=0, NotChecked=0, Total=30450 [2023-12-20 08:47:32,257 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 4745 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 4745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:32,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 240 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 4745 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-20 08:47:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-20 08:47:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 136. [2023-12-20 08:47:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 135 states have internal predecessors, (164), 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) [2023-12-20 08:47:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2023-12-20 08:47:32,332 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 64 [2023-12-20 08:47:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:32,332 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2023-12-20 08:47:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 124 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) [2023-12-20 08:47:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2023-12-20 08:47:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-20 08:47:32,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:32,333 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:32,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 08:47:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:32,540 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:32,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1835253731, now seen corresponding path program 28 times [2023-12-20 08:47:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400617858] [2023-12-20 08:47:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-20 08:47:32,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400617858] [2023-12-20 08:47:32,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400617858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:32,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119279449] [2023-12-20 08:47:32,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:47:32,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:32,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:32,828 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:32,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 08:47:32,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:47:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:47:32,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:47:32,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-20 08:47:33,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-20 08:47:33,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119279449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:33,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:33,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-12-20 08:47:33,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521428325] [2023-12-20 08:47:33,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:33,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 08:47:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 08:47:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:47:33,764 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:47:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:34,306 INFO L93 Difference]: Finished difference Result 273 states and 321 transitions. [2023-12-20 08:47:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-20 08:47:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-20 08:47:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:34,307 INFO L225 Difference]: With dead ends: 273 [2023-12-20 08:47:34,307 INFO L226 Difference]: Without dead ends: 125 [2023-12-20 08:47:34,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 21 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=639, Invalid=2901, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:47:34,308 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:34,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 48 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:47:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-20 08:47:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2023-12-20 08:47:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 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) [2023-12-20 08:47:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2023-12-20 08:47:34,398 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 65 [2023-12-20 08:47:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:34,398 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2023-12-20 08:47:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:47:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2023-12-20 08:47:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 08:47:34,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:34,399 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:34,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-20 08:47:34,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:34,600 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:34,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1090369370, now seen corresponding path program 29 times [2023-12-20 08:47:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:34,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261672044] [2023-12-20 08:47:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-20 08:47:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261672044] [2023-12-20 08:47:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261672044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969260269] [2023-12-20 08:47:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:47:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:34,936 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:34,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 08:47:35,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 08:47:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:47:35,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:47:35,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-20 08:47:35,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-20 08:47:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969260269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:35,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2023-12-20 08:47:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438401670] [2023-12-20 08:47:35,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:35,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 08:47:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 08:47:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:47:35,952 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 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) [2023-12-20 08:47:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:47:36,404 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2023-12-20 08:47:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 08:47:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 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 [2023-12-20 08:47:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:47:36,404 INFO L225 Difference]: With dead ends: 120 [2023-12-20 08:47:36,404 INFO L226 Difference]: Without dead ends: 92 [2023-12-20 08:47:36,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 100 SyntacticMatches, 22 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=637, Invalid=2903, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:47:36,405 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:47:36,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 53 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:47:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-20 08:47:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2023-12-20 08:47:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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) [2023-12-20 08:47:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-12-20 08:47:36,451 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2023-12-20 08:47:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:47:36,452 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-12-20 08:47:36,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 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) [2023-12-20 08:47:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-12-20 08:47:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-20 08:47:36,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:47:36,452 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:47:36,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-20 08:47:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:36,653 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:47:36,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:47:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1123784693, now seen corresponding path program 30 times [2023-12-20 08:47:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:47:36,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518636095] [2023-12-20 08:47:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:47:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:47:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:47:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 16 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:47:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:47:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518636095] [2023-12-20 08:47:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518636095] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:47:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282079901] [2023-12-20 08:47:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:47:43,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:47:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:47:43,069 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:47:43,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 08:47:43,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 08:47:43,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:47:43,316 WARN L260 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 217 conjunts are in the unsatisfiable core [2023-12-20 08:47:43,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:47:43,605 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 [2023-12-20 08:47:47,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:47:47,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:47:47,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-12-20 08:47:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 3 proven. 324 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:47:47,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:47:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:47:55,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282079901] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:47:55,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:47:55,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 61, 49] total 156 [2023-12-20 08:47:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396424007] [2023-12-20 08:47:55,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:47:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-12-20 08:47:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:47:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-12-20 08:47:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=22866, Unknown=0, NotChecked=0, Total=24180 [2023-12-20 08:47:55,523 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 156 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 156 states have internal predecessors, (189), 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) [2023-12-20 08:48:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:48:17,698 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2023-12-20 08:48:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-20 08:48:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 156 states have internal predecessors, (189), 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 69 [2023-12-20 08:48:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:48:17,699 INFO L225 Difference]: With dead ends: 166 [2023-12-20 08:48:17,699 INFO L226 Difference]: Without dead ends: 158 [2023-12-20 08:48:17,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14421 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=4032, Invalid=52374, Unknown=0, NotChecked=0, Total=56406 [2023-12-20 08:48:17,701 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 183 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 5951 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 6651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 5951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:48:17,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 231 Invalid, 6651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 5951 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-12-20 08:48:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-20 08:48:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2023-12-20 08:48:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 132 states have internal predecessors, (156), 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) [2023-12-20 08:48:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2023-12-20 08:48:17,812 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 69 [2023-12-20 08:48:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:48:17,812 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2023-12-20 08:48:17,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.2115384615384615) internal successors, (189), 156 states have internal predecessors, (189), 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) [2023-12-20 08:48:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2023-12-20 08:48:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 08:48:17,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:48:17,813 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:48:17,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 08:48:18,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-20 08:48:18,014 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:48:18,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:48:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1538006018, now seen corresponding path program 31 times [2023-12-20 08:48:18,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:48:18,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040053208] [2023-12-20 08:48:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:48:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:48:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:48:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-20 08:48:18,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:48:18,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040053208] [2023-12-20 08:48:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040053208] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:48:18,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276726028] [2023-12-20 08:48:18,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:48:18,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:48:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:48:18,367 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:48:18,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 08:48:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:48:18,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 08:48:18,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:48:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-20 08:48:18,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:48:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-12-20 08:48:19,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276726028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:48:19,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:48:19,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 08:48:19,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212954920] [2023-12-20 08:48:19,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:48:19,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 08:48:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:48:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 08:48:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:48:19,009 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2023-12-20 08:48:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:48:19,390 INFO L93 Difference]: Finished difference Result 279 states and 326 transitions. [2023-12-20 08:48:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 08:48:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) Word has length 70 [2023-12-20 08:48:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:48:19,391 INFO L225 Difference]: With dead ends: 279 [2023-12-20 08:48:19,391 INFO L226 Difference]: Without dead ends: 134 [2023-12-20 08:48:19,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1336, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 08:48:19,392 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:48:19,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:48:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-20 08:48:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-20 08:48:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1804511278195489) internal successors, (157), 133 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) [2023-12-20 08:48:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2023-12-20 08:48:19,508 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 70 [2023-12-20 08:48:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:48:19,508 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2023-12-20 08:48:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2023-12-20 08:48:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2023-12-20 08:48:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-20 08:48:19,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:48:19,509 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:48:19,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 08:48:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:48:19,711 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:48:19,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:48:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash 520926132, now seen corresponding path program 32 times [2023-12-20 08:48:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:48:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193327719] [2023-12-20 08:48:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:48:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:48:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:48:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-20 08:48:20,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:48:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193327719] [2023-12-20 08:48:20,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193327719] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:48:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90420977] [2023-12-20 08:48:20,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:48:20,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:48:20,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:48:20,078 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:48:20,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 08:48:20,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:48:20,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:48:20,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 08:48:20,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:48:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-20 08:48:20,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:48:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-20 08:48:20,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90420977] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:48:20,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:48:20,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 08:48:20,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461466739] [2023-12-20 08:48:20,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:48:20,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 08:48:20,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:48:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 08:48:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:48:20,676 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2023-12-20 08:48:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:48:20,896 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2023-12-20 08:48:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 08:48:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) Word has length 71 [2023-12-20 08:48:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:48:20,897 INFO L225 Difference]: With dead ends: 168 [2023-12-20 08:48:20,897 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 08:48:20,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 104 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 08:48:20,898 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:48:20,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:48:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 08:48:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-20 08:48:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 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) [2023-12-20 08:48:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-12-20 08:48:20,976 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 71 [2023-12-20 08:48:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:48:20,976 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-12-20 08:48:20,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2023-12-20 08:48:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-12-20 08:48:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-20 08:48:20,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:48:20,976 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:48:20,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 08:48:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:48:21,178 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:48:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:48:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash -858828527, now seen corresponding path program 33 times [2023-12-20 08:48:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:48:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773738072] [2023-12-20 08:48:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:48:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:48:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:48:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 28 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:48:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:48:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773738072] [2023-12-20 08:48:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773738072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:48:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540109813] [2023-12-20 08:48:29,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:48:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:48:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:48:29,324 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:48:29,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 08:48:29,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 08:48:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:48:29,512 WARN L260 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 236 conjunts are in the unsatisfiable core [2023-12-20 08:48:29,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:48:29,647 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 [2023-12-20 08:48:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:48:33,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:48:33,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2023-12-20 08:48:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 6 proven. 369 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 08:48:33,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:48:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 362 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 08:48:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540109813] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:48:43,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:48:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 59, 64] total 170 [2023-12-20 08:48:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966807433] [2023-12-20 08:48:43,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:48:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2023-12-20 08:48:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:48:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2023-12-20 08:48:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1881, Invalid=26849, Unknown=0, NotChecked=0, Total=28730 [2023-12-20 08:48:43,067 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 170 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 170 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:11,394 INFO L93 Difference]: Finished difference Result 277 states and 318 transitions. [2023-12-20 08:49:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-12-20 08:49:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 170 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-12-20 08:49:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:11,396 INFO L225 Difference]: With dead ends: 277 [2023-12-20 08:49:11,396 INFO L226 Difference]: Without dead ends: 252 [2023-12-20 08:49:11,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19048 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=5945, Invalid=69405, Unknown=0, NotChecked=0, Total=75350 [2023-12-20 08:49:11,400 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 452 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 7372 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 8666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 7372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:11,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 426 Invalid, 8666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 7372 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-20 08:49:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-20 08:49:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 183. [2023-12-20 08:49:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1758241758241759) internal successors, (214), 182 states have internal predecessors, (214), 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) [2023-12-20 08:49:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 214 transitions. [2023-12-20 08:49:11,554 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 214 transitions. Word has length 74 [2023-12-20 08:49:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:11,554 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 214 transitions. [2023-12-20 08:49:11,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 170 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 214 transitions. [2023-12-20 08:49:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-20 08:49:11,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:11,555 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:11,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-20 08:49:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 08:49:11,755 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:11,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1898853667, now seen corresponding path program 34 times [2023-12-20 08:49:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:11,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008888309] [2023-12-20 08:49:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:11,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-20 08:49:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:49:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008888309] [2023-12-20 08:49:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008888309] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:49:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685812800] [2023-12-20 08:49:12,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:49:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:49:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:49:12,134 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:49:12,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 08:49:12,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:49:12,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:49:12,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:49:12,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:49:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-20 08:49:12,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:49:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-20 08:49:13,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685812800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:49:13,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:49:13,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2023-12-20 08:49:13,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032254290] [2023-12-20 08:49:13,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 08:49:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 08:49:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2539, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 08:49:13,280 INFO L87 Difference]: Start difference. First operand 183 states and 214 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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) [2023-12-20 08:49:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:14,031 INFO L93 Difference]: Finished difference Result 369 states and 425 transitions. [2023-12-20 08:49:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-20 08:49:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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 75 [2023-12-20 08:49:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:14,032 INFO L225 Difference]: With dead ends: 369 [2023-12-20 08:49:14,032 INFO L226 Difference]: Without dead ends: 158 [2023-12-20 08:49:14,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 98 SyntacticMatches, 25 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=857, Invalid=3973, Unknown=0, NotChecked=0, Total=4830 [2023-12-20 08:49:14,033 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:14,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 51 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:49:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-20 08:49:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 134. [2023-12-20 08:49:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 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) [2023-12-20 08:49:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2023-12-20 08:49:14,190 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 75 [2023-12-20 08:49:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2023-12-20 08:49:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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) [2023-12-20 08:49:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2023-12-20 08:49:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 08:49:14,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:14,191 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:14,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-20 08:49:14,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-20 08:49:14,397 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:14,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1198426726, now seen corresponding path program 35 times [2023-12-20 08:49:14,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:14,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673746318] [2023-12-20 08:49:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:14,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-20 08:49:14,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:49:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673746318] [2023-12-20 08:49:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673746318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:49:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768309206] [2023-12-20 08:49:14,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:49:14,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:49:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:49:14,849 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:49:14,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 08:49:15,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-20 08:49:15,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:49:15,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:49:15,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:49:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-20 08:49:15,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:49:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-20 08:49:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768309206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:49:16,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:49:16,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2023-12-20 08:49:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393142363] [2023-12-20 08:49:16,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 08:49:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 08:49:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2539, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 08:49:16,178 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:16,719 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2023-12-20 08:49:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 08:49:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-20 08:49:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:16,720 INFO L225 Difference]: With dead ends: 139 [2023-12-20 08:49:16,720 INFO L226 Difference]: Without dead ends: 107 [2023-12-20 08:49:16,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 114 SyntacticMatches, 26 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=855, Invalid=3975, Unknown=0, NotChecked=0, Total=4830 [2023-12-20 08:49:16,721 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:16,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 50 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:49:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-20 08:49:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2023-12-20 08:49:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 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) [2023-12-20 08:49:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-12-20 08:49:16,797 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2023-12-20 08:49:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:16,798 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-12-20 08:49:16,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-12-20 08:49:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-20 08:49:16,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:16,798 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:16,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-20 08:49:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-20 08:49:16,998 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:16,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 778749451, now seen corresponding path program 36 times [2023-12-20 08:49:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:16,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24997532] [2023-12-20 08:49:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:49:25,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:49:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24997532] [2023-12-20 08:49:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24997532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:49:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528549490] [2023-12-20 08:49:25,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:49:25,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:49:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:49:25,844 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:49:25,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-20 08:49:26,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-20 08:49:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:49:26,211 WARN L260 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 237 conjunts are in the unsatisfiable core [2023-12-20 08:49:26,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:49:26,245 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 [2023-12-20 08:49:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:49:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:49:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:49:28,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:49:28,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 71 [2023-12-20 08:49:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 13 proven. 364 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 08:49:29,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:49:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 08:49:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528549490] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:49:33,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:49:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 36, 34] total 127 [2023-12-20 08:49:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287323904] [2023-12-20 08:49:33,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-12-20 08:49:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-12-20 08:49:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=15328, Unknown=0, NotChecked=0, Total=16002 [2023-12-20 08:49:33,865 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 127 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 127 states have internal predecessors, (199), 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) [2023-12-20 08:49:43,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 08:49:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:46,010 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2023-12-20 08:49:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-20 08:49:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 127 states have internal predecessors, (199), 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 79 [2023-12-20 08:49:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:46,011 INFO L225 Difference]: With dead ends: 130 [2023-12-20 08:49:46,011 INFO L226 Difference]: Without dead ends: 126 [2023-12-20 08:49:46,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5167 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1603, Invalid=28152, Unknown=1, NotChecked=0, Total=29756 [2023-12-20 08:49:46,012 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 5692 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 5929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5692 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:46,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 199 Invalid, 5929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5692 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-12-20 08:49:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-20 08:49:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2023-12-20 08:49:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 112 states have internal predecessors, (120), 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) [2023-12-20 08:49:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2023-12-20 08:49:46,149 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 79 [2023-12-20 08:49:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:46,149 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2023-12-20 08:49:46,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 127 states have internal predecessors, (199), 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) [2023-12-20 08:49:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2023-12-20 08:49:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-20 08:49:46,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:46,149 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:46,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-20 08:49:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-20 08:49:46,350 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1469093333, now seen corresponding path program 37 times [2023-12-20 08:49:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:46,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955567614] [2023-12-20 08:49:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-20 08:49:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:49:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955567614] [2023-12-20 08:49:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955567614] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:49:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041794812] [2023-12-20 08:49:46,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:49:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:49:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:49:46,779 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:49:46,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-20 08:49:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:46,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 08:49:46,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:49:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-20 08:49:47,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:49:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-20 08:49:47,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041794812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:49:47,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:49:47,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 08:49:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30457998] [2023-12-20 08:49:47,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 08:49:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 08:49:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:49:47,677 INFO L87 Difference]: Start difference. First operand 113 states and 120 transitions. Second operand has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:48,114 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2023-12-20 08:49:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 08:49:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-12-20 08:49:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:48,115 INFO L225 Difference]: With dead ends: 224 [2023-12-20 08:49:48,115 INFO L226 Difference]: Without dead ends: 114 [2023-12-20 08:49:48,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 27 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:49:48,116 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:49:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-20 08:49:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-12-20 08:49:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 113 states have internal predecessors, (121), 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) [2023-12-20 08:49:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2023-12-20 08:49:48,240 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2023-12-20 08:49:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:48,240 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2023-12-20 08:49:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2023-12-20 08:49:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 08:49:48,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:48,241 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:48,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-20 08:49:48,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-20 08:49:48,441 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:48,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:48,442 INFO L85 PathProgramCache]: Analyzing trace with hash -465007007, now seen corresponding path program 38 times [2023-12-20 08:49:48,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:48,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426574523] [2023-12-20 08:49:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:49:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-20 08:49:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:49:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426574523] [2023-12-20 08:49:48,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426574523] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:49:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554108908] [2023-12-20 08:49:48,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:49:48,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:49:48,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:49:48,882 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:49:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-20 08:49:49,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:49:49,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:49:49,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 08:49:49,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:49:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-20 08:49:49,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:49:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-20 08:49:49,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554108908] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:49:49,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:49:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 08:49:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384552345] [2023-12-20 08:49:49,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:49:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 08:49:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:49:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 08:49:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:49:49,652 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:49:49,955 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2023-12-20 08:49:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 08:49:49,955 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-20 08:49:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:49:49,956 INFO L225 Difference]: With dead ends: 152 [2023-12-20 08:49:49,956 INFO L226 Difference]: Without dead ends: 85 [2023-12-20 08:49:49,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 118 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:49:49,957 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:49:49,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:49:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-20 08:49:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-20 08:49:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 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) [2023-12-20 08:49:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-12-20 08:49:50,070 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 81 [2023-12-20 08:49:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:49:50,070 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-12-20 08:49:50,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:49:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-12-20 08:49:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-20 08:49:50,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:49:50,071 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:49:50,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-20 08:49:50,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-12-20 08:49:50,277 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:49:50,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:49:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1717177617, now seen corresponding path program 39 times [2023-12-20 08:49:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:49:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117330708] [2023-12-20 08:49:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:49:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:49:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:50:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 45 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:50:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:50:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117330708] [2023-12-20 08:50:00,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117330708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:50:00,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895622959] [2023-12-20 08:50:00,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:50:00,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:50:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:50:00,797 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:50:00,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-20 08:50:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 08:50:01,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:50:01,079 WARN L260 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 274 conjunts are in the unsatisfiable core [2023-12-20 08:50:01,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:50:02,017 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 [2023-12-20 08:50:02,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 08:50:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:50:06,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:50:06,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2023-12-20 08:50:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:50:06,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:50:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:50:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895622959] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:50:14,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:50:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 52, 50] total 175 [2023-12-20 08:50:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601863046] [2023-12-20 08:50:14,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:50:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2023-12-20 08:50:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:50:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2023-12-20 08:50:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1915, Invalid=28535, Unknown=0, NotChecked=0, Total=30450 [2023-12-20 08:50:14,278 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 175 states, 175 states have (on average 1.4057142857142857) internal successors, (246), 175 states have internal predecessors, (246), 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) [2023-12-20 08:50:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:50:35,252 INFO L93 Difference]: Finished difference Result 279 states and 303 transitions. [2023-12-20 08:50:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-12-20 08:50:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.4057142857142857) internal successors, (246), 175 states have internal predecessors, (246), 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 84 [2023-12-20 08:50:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:50:35,254 INFO L225 Difference]: With dead ends: 279 [2023-12-20 08:50:35,254 INFO L226 Difference]: Without dead ends: 271 [2023-12-20 08:50:35,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18852 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=4738, Invalid=63644, Unknown=0, NotChecked=0, Total=68382 [2023-12-20 08:50:35,257 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 7701 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 7701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:50:35,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 273 Invalid, 8374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 7701 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-20 08:50:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-12-20 08:50:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 175. [2023-12-20 08:50:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.103448275862069) internal successors, (192), 174 states have internal predecessors, (192), 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) [2023-12-20 08:50:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 192 transitions. [2023-12-20 08:50:35,474 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 192 transitions. Word has length 84 [2023-12-20 08:50:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:50:35,475 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 192 transitions. [2023-12-20 08:50:35,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.4057142857142857) internal successors, (246), 175 states have internal predecessors, (246), 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) [2023-12-20 08:50:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 192 transitions. [2023-12-20 08:50:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-20 08:50:35,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:50:35,476 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:50:35,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-20 08:50:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-20 08:50:35,684 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:50:35,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:50:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 442952291, now seen corresponding path program 40 times [2023-12-20 08:50:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:50:35,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881355642] [2023-12-20 08:50:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:50:35,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:50:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:50:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-20 08:50:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:50:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881355642] [2023-12-20 08:50:36,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881355642] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:50:36,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651996765] [2023-12-20 08:50:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:50:36,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:50:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:50:36,181 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:50:36,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-20 08:50:36,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:50:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:50:36,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 08:50:36,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:50:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-20 08:50:37,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:50:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-12-20 08:50:37,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651996765] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:50:37,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:50:37,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2023-12-20 08:50:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484494912] [2023-12-20 08:50:37,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:50:37,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-20 08:50:37,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:50:37,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-20 08:50:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=3334, Unknown=0, NotChecked=0, Total=4032 [2023-12-20 08:50:37,571 INFO L87 Difference]: Start difference. First operand 175 states and 192 transitions. Second operand has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 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) [2023-12-20 08:50:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:50:38,530 INFO L93 Difference]: Finished difference Result 321 states and 347 transitions. [2023-12-20 08:50:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-20 08:50:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-12-20 08:50:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:50:38,531 INFO L225 Difference]: With dead ends: 321 [2023-12-20 08:50:38,531 INFO L226 Difference]: Without dead ends: 131 [2023-12-20 08:50:38,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 110 SyntacticMatches, 29 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1107, Invalid=5213, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 08:50:38,532 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:50:38,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 75 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:50:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-20 08:50:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2023-12-20 08:50:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 120 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) [2023-12-20 08:50:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2023-12-20 08:50:38,726 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 85 [2023-12-20 08:50:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:50:38,726 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2023-12-20 08:50:38,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 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) [2023-12-20 08:50:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2023-12-20 08:50:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-20 08:50:38,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:50:38,727 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:50:38,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-20 08:50:38,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-20 08:50:38,933 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:50:38,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:50:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1637877574, now seen corresponding path program 41 times [2023-12-20 08:50:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:50:38,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578853608] [2023-12-20 08:50:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:50:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:50:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:50:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 08:50:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:50:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578853608] [2023-12-20 08:50:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578853608] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:50:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021852924] [2023-12-20 08:50:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:50:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:50:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:50:39,439 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:50:39,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-20 08:50:40,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 08:50:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:50:40,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 08:50:40,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:50:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 08:50:40,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:50:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-20 08:50:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021852924] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:50:40,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:50:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 08:50:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541473048] [2023-12-20 08:50:40,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:50:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 08:50:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:50:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 08:50:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1871, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 08:50:40,693 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 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) [2023-12-20 08:50:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:50:41,066 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2023-12-20 08:50:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 08:50:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-12-20 08:50:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:50:41,067 INFO L225 Difference]: With dead ends: 126 [2023-12-20 08:50:41,067 INFO L226 Difference]: Without dead ends: 90 [2023-12-20 08:50:41,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 30 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=1953, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 08:50:41,068 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:50:41,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:50:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-20 08:50:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-20 08:50:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 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) [2023-12-20 08:50:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2023-12-20 08:50:41,209 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 86 [2023-12-20 08:50:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:50:41,209 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2023-12-20 08:50:41,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.66) internal successors, (83), 50 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) [2023-12-20 08:50:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2023-12-20 08:50:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 08:50:41,210 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:50:41,210 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:50:41,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-20 08:50:41,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:50:41,410 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:50:41,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:50:41,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1410501621, now seen corresponding path program 42 times [2023-12-20 08:50:41,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:50:41,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991601961] [2023-12-20 08:50:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:50:41,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:50:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:50:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 55 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:50:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:50:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991601961] [2023-12-20 08:50:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991601961] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:50:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612090767] [2023-12-20 08:50:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:50:53,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:50:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:50:53,254 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:50:53,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-20 08:50:53,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-20 08:50:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:50:53,807 WARN L260 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 293 conjunts are in the unsatisfiable core [2023-12-20 08:50:53,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:50:54,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:50:54,348 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 [2023-12-20 08:51:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:17,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:51:17,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 165 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 156 treesize of output 555 [2023-12-20 08:51:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 590 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:51:18,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 08:51:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612090767] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:33,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 82, 74] total 219 [2023-12-20 08:51:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192680472] [2023-12-20 08:51:33,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 219 states [2023-12-20 08:51:33,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 219 interpolants. [2023-12-20 08:51:33,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=45190, Unknown=3, NotChecked=0, Total=47742 [2023-12-20 08:51:33,755 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 219 states, 219 states have (on average 1.1141552511415524) internal successors, (244), 219 states have internal predecessors, (244), 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) [2023-12-20 08:53:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:08,486 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2023-12-20 08:53:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2023-12-20 08:53:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 219 states, 219 states have (on average 1.1141552511415524) internal successors, (244), 219 states have internal predecessors, (244), 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 89 [2023-12-20 08:53:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:08,488 INFO L225 Difference]: With dead ends: 383 [2023-12-20 08:53:08,488 INFO L226 Difference]: Without dead ends: 373 [2023-12-20 08:53:08,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44006 ImplicationChecksByTransitivity, 121.2s TimeCoverageRelationStatistics Valid=11149, Invalid=156538, Unknown=3, NotChecked=0, Total=167690 [2023-12-20 08:53:08,495 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 588 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 12983 mSolverCounterSat, 2438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 15421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2438 IncrementalHoareTripleChecker+Valid, 12983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:08,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 493 Invalid, 15421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2438 Valid, 12983 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2023-12-20 08:53:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-12-20 08:53:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 238. [2023-12-20 08:53:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.1983122362869199) internal successors, (284), 237 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) [2023-12-20 08:53:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2023-12-20 08:53:08,978 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 89 [2023-12-20 08:53:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:08,978 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2023-12-20 08:53:08,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 219 states, 219 states have (on average 1.1141552511415524) internal successors, (244), 219 states have internal predecessors, (244), 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) [2023-12-20 08:53:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2023-12-20 08:53:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 08:53:08,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:08,979 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:08,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-20 08:53:09,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:09,179 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:09,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1055759784, now seen corresponding path program 43 times [2023-12-20 08:53:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803297945] [2023-12-20 08:53:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-20 08:53:09,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803297945] [2023-12-20 08:53:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803297945] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690511633] [2023-12-20 08:53:09,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:53:09,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:09,728 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:53:09,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-20 08:53:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:09,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 08:53:09,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-20 08:53:10,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-20 08:53:10,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690511633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:10,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:10,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-12-20 08:53:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666989833] [2023-12-20 08:53:10,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 08:53:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 08:53:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 08:53:10,744 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) [2023-12-20 08:53:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:11,646 INFO L93 Difference]: Finished difference Result 493 states and 586 transitions. [2023-12-20 08:53:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 08:53:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) Word has length 91 [2023-12-20 08:53:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:11,648 INFO L225 Difference]: With dead ends: 493 [2023-12-20 08:53:11,648 INFO L226 Difference]: Without dead ends: 239 [2023-12-20 08:53:11,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 133 SyntacticMatches, 31 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=638, Invalid=2224, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:53:11,648 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:11,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 64 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:53:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-12-20 08:53:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-12-20 08:53:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1974789915966386) internal successors, (285), 238 states have internal predecessors, (285), 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) [2023-12-20 08:53:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 285 transitions. [2023-12-20 08:53:12,013 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 285 transitions. Word has length 91 [2023-12-20 08:53:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:12,013 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 285 transitions. [2023-12-20 08:53:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) [2023-12-20 08:53:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 285 transitions. [2023-12-20 08:53:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 08:53:12,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:12,014 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:12,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-20 08:53:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-20 08:53:12,215 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:12,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1850974306, now seen corresponding path program 44 times [2023-12-20 08:53:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:12,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123320590] [2023-12-20 08:53:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 105 proven. 151 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-20 08:53:12,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:12,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123320590] [2023-12-20 08:53:12,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123320590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:12,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097462420] [2023-12-20 08:53:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:53:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:12,788 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:53:12,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-20 08:53:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:53:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:53:12,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 08:53:12,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-20 08:53:13,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-20 08:53:13,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097462420] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:13,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-12-20 08:53:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835187236] [2023-12-20 08:53:13,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-20 08:53:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-20 08:53:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 08:53:13,777 INFO L87 Difference]: Start difference. First operand 239 states and 285 transitions. Second operand has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) [2023-12-20 08:53:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:14,201 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2023-12-20 08:53:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 08:53:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) Word has length 92 [2023-12-20 08:53:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:14,202 INFO L225 Difference]: With dead ends: 282 [2023-12-20 08:53:14,202 INFO L226 Difference]: Without dead ends: 144 [2023-12-20 08:53:14,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 134 SyntacticMatches, 32 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 08:53:14,203 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:14,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:53:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-20 08:53:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 95. [2023-12-20 08:53:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 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) [2023-12-20 08:53:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-12-20 08:53:14,373 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 92 [2023-12-20 08:53:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:14,373 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-12-20 08:53:14,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 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) [2023-12-20 08:53:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-12-20 08:53:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-20 08:53:14,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:14,373 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:14,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-20 08:53:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-20 08:53:14,574 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:14,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1470822673, now seen corresponding path program 45 times [2023-12-20 08:53:14,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:14,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562886187] [2023-12-20 08:53:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 55 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:27,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562886187] [2023-12-20 08:53:27,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562886187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:27,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718755359] [2023-12-20 08:53:27,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:53:27,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:27,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:27,758 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:53:27,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-20 08:53:28,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 08:53:28,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:53:28,120 WARN L260 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 309 conjunts are in the unsatisfiable core [2023-12-20 08:53:28,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:28,904 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 [2023-12-20 08:53:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:39,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718755359] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:57,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:57,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 84, 84] total 246 [2023-12-20 08:53:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887046649] [2023-12-20 08:53:57,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 246 states [2023-12-20 08:53:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2023-12-20 08:53:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3620, Invalid=56650, Unknown=0, NotChecked=0, Total=60270 [2023-12-20 08:53:57,239 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 246 states, 246 states have (on average 1.1016260162601625) internal successors, (271), 246 states have internal predecessors, (271), 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) [2023-12-20 08:54:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:47,190 INFO L93 Difference]: Finished difference Result 335 states and 364 transitions. [2023-12-20 08:54:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2023-12-20 08:54:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 246 states, 246 states have (on average 1.1016260162601625) internal successors, (271), 246 states have internal predecessors, (271), 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 [2023-12-20 08:54:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:47,192 INFO L225 Difference]: With dead ends: 335 [2023-12-20 08:54:47,192 INFO L226 Difference]: Without dead ends: 270 [2023-12-20 08:54:47,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38376 ImplicationChecksByTransitivity, 71.0s TimeCoverageRelationStatistics Valid=10444, Invalid=135098, Unknown=0, NotChecked=0, Total=145542 [2023-12-20 08:54:47,198 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 253 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 11178 mSolverCounterSat, 1328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 12506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 11178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:47,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 276 Invalid, 12506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 11178 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-12-20 08:54:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-12-20 08:54:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 236. [2023-12-20 08:54:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.097872340425532) internal successors, (258), 235 states have internal predecessors, (258), 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) [2023-12-20 08:54:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 258 transitions. [2023-12-20 08:54:47,585 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 258 transitions. Word has length 94 [2023-12-20 08:54:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:47,585 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 258 transitions. [2023-12-20 08:54:47,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 246 states, 246 states have (on average 1.1016260162601625) internal successors, (271), 246 states have internal predecessors, (271), 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) [2023-12-20 08:54:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 258 transitions. [2023-12-20 08:54:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 08:54:47,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:47,586 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:47,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:47,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-20 08:54:47,795 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:47,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1311700819, now seen corresponding path program 46 times [2023-12-20 08:54:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969304454] [2023-12-20 08:54:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:47,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969304454] [2023-12-20 08:54:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969304454] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013189942] [2023-12-20 08:54:48,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:54:48,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:48,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:48,483 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:54:48,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-20 08:54:48,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:54:48,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:48,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 08:54:48,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:49,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013189942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:50,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:50,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-12-20 08:54:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144027308] [2023-12-20 08:54:50,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-20 08:54:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-20 08:54:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=6805, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 08:54:50,675 INFO L87 Difference]: Start difference. First operand 236 states and 258 transitions. Second operand has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 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) [2023-12-20 08:54:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:52,968 INFO L93 Difference]: Finished difference Result 447 states and 488 transitions. [2023-12-20 08:54:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-20 08:54:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 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 96 [2023-12-20 08:54:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:52,969 INFO L225 Difference]: With dead ends: 447 [2023-12-20 08:54:52,969 INFO L226 Difference]: Without dead ends: 273 [2023-12-20 08:54:52,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 122 SyntacticMatches, 18 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5296 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2054, Invalid=13446, Unknown=0, NotChecked=0, Total=15500 [2023-12-20 08:54:52,971 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 154 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:52,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 132 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 08:54:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-20 08:54:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 218. [2023-12-20 08:54:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0783410138248848) internal successors, (234), 217 states have internal predecessors, (234), 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) [2023-12-20 08:54:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 234 transitions. [2023-12-20 08:54:53,408 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 234 transitions. Word has length 96 [2023-12-20 08:54:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:53,409 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 234 transitions. [2023-12-20 08:54:53,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 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) [2023-12-20 08:54:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 234 transitions. [2023-12-20 08:54:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-20 08:54:53,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:53,409 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:53,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:53,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:53,610 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:53,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash 562215396, now seen corresponding path program 47 times [2023-12-20 08:54:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:53,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419992897] [2023-12-20 08:54:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:54,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:54,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419992897] [2023-12-20 08:54:54,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419992897] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:54,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276502280] [2023-12-20 08:54:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:54:54,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:54,251 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:54:54,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-20 08:54:54,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-20 08:54:54,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:54,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 08:54:55,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:55,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-20 08:54:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276502280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:56,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:56,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-12-20 08:54:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315549180] [2023-12-20 08:54:56,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:56,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-20 08:54:56,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-20 08:54:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=6821, Unknown=0, NotChecked=0, Total=7832 [2023-12-20 08:54:56,831 INFO L87 Difference]: Start difference. First operand 218 states and 234 transitions. Second operand has 89 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 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) [2023-12-20 08:54:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:58,241 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2023-12-20 08:54:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-20 08:54:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 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 96 [2023-12-20 08:54:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:58,242 INFO L225 Difference]: With dead ends: 239 [2023-12-20 08:54:58,242 INFO L226 Difference]: Without dead ends: 100 [2023-12-20 08:54:58,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 122 SyntacticMatches, 18 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2039, Invalid=13461, Unknown=0, NotChecked=0, Total=15500 [2023-12-20 08:54:58,244 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:58,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 73 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 08:54:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-20 08:54:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-20 08:54:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 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) [2023-12-20 08:54:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2023-12-20 08:54:58,444 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 96 [2023-12-20 08:54:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:58,444 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2023-12-20 08:54:58,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 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) [2023-12-20 08:54:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2023-12-20 08:54:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-20 08:54:58,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:58,445 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:58,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:58,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-20 08:54:58,655 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:58,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1244892661, now seen corresponding path program 48 times [2023-12-20 08:54:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372237140] [2023-12-20 08:54:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372237140] [2023-12-20 08:55:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372237140] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996552233] [2023-12-20 08:55:15,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:55:15,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:15,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:15,964 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:55:15,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-20 08:55:16,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-20 08:55:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:16,496 WARN L260 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 329 conjunts are in the unsatisfiable core [2023-12-20 08:55:16,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:16,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:55:16,563 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 [2023-12-20 08:55:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:26,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:55:26,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 58 treesize of output 93 [2023-12-20 08:55:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 5 proven. 750 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:55:26,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:55:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 674 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-20 08:55:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996552233] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:55:46,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:55:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 87, 71] total 221 [2023-12-20 08:55:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036887069] [2023-12-20 08:55:46,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:55:46,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2023-12-20 08:55:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:55:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2023-12-20 08:55:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2849, Invalid=45771, Unknown=0, NotChecked=0, Total=48620 [2023-12-20 08:55:46,646 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 221 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 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) [2023-12-20 08:57:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:38,822 INFO L93 Difference]: Finished difference Result 280 states and 333 transitions. [2023-12-20 08:57:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-20 08:57:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 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 [2023-12-20 08:57:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:38,824 INFO L225 Difference]: With dead ends: 280 [2023-12-20 08:57:38,824 INFO L226 Difference]: Without dead ends: 264 [2023-12-20 08:57:38,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34679 ImplicationChecksByTransitivity, 131.8s TimeCoverageRelationStatistics Valid=12641, Invalid=138291, Unknown=0, NotChecked=0, Total=150932 [2023-12-20 08:57:38,830 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 458 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 12583 mSolverCounterSat, 1548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 14131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1548 IncrementalHoareTripleChecker+Valid, 12583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:38,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 306 Invalid, 14131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1548 Valid, 12583 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2023-12-20 08:57:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-12-20 08:57:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 203. [2023-12-20 08:57:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.188118811881188) internal successors, (240), 202 states have internal predecessors, (240), 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) [2023-12-20 08:57:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 240 transitions. [2023-12-20 08:57:39,369 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 240 transitions. Word has length 99 [2023-12-20 08:57:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:39,369 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 240 transitions. [2023-12-20 08:57:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 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) [2023-12-20 08:57:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 240 transitions. [2023-12-20 08:57:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-20 08:57:39,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:39,370 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:39,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:39,571 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:39,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash -421939842, now seen corresponding path program 49 times [2023-12-20 08:57:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124671088] [2023-12-20 08:57:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 154 proven. 170 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-20 08:57:40,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124671088] [2023-12-20 08:57:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124671088] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564420758] [2023-12-20 08:57:40,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:57:40,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:40,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:40,276 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:57:40,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-20 08:57:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:40,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 08:57:40,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-20 08:57:41,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-20 08:57:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564420758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:41,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:41,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-12-20 08:57:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5550858] [2023-12-20 08:57:41,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:41,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-20 08:57:41,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-20 08:57:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 08:57:41,537 INFO L87 Difference]: Start difference. First operand 203 states and 240 transitions. Second operand has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2023-12-20 08:57:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:42,891 INFO L93 Difference]: Finished difference Result 425 states and 500 transitions. [2023-12-20 08:57:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 08:57:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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 100 [2023-12-20 08:57:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:42,892 INFO L225 Difference]: With dead ends: 425 [2023-12-20 08:57:42,892 INFO L226 Difference]: Without dead ends: 204 [2023-12-20 08:57:42,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 145 SyntacticMatches, 35 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=788, Invalid=2752, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:57:42,893 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:42,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 63 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:57:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-20 08:57:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-12-20 08:57:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.187192118226601) internal successors, (241), 203 states have internal predecessors, (241), 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) [2023-12-20 08:57:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2023-12-20 08:57:43,480 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 100 [2023-12-20 08:57:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:43,480 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2023-12-20 08:57:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2023-12-20 08:57:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2023-12-20 08:57:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-20 08:57:43,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:43,480 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:43,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-20 08:57:43,681 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:43,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash -419650892, now seen corresponding path program 50 times [2023-12-20 08:57:43,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:43,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144852768] [2023-12-20 08:57:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:43,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 136 proven. 188 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-20 08:57:44,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144852768] [2023-12-20 08:57:44,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144852768] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567053391] [2023-12-20 08:57:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:57:44,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:44,439 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:57:44,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-20 08:57:44,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:57:44,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:57:44,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 08:57:44,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-20 08:57:45,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-20 08:57:45,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567053391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:45,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:45,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-12-20 08:57:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631304134] [2023-12-20 08:57:45,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:45,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-20 08:57:45,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-20 08:57:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=2621, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 08:57:45,605 INFO L87 Difference]: Start difference. First operand 204 states and 241 transitions. Second operand has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2023-12-20 08:57:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:46,116 INFO L93 Difference]: Finished difference Result 250 states and 292 transitions. [2023-12-20 08:57:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-20 08:57:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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 101 [2023-12-20 08:57:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:46,117 INFO L225 Difference]: With dead ends: 250 [2023-12-20 08:57:46,117 INFO L226 Difference]: Without dead ends: 105 [2023-12-20 08:57:46,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 146 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=2718, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 08:57:46,118 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:46,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 53 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:57:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-20 08:57:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-20 08:57:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 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) [2023-12-20 08:57:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-12-20 08:57:46,409 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 101 [2023-12-20 08:57:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:46,410 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-12-20 08:57:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2023-12-20 08:57:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-12-20 08:57:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-20 08:57:46,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:46,410 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:46,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-20 08:57:46,611 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:46,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -985524975, now seen corresponding path program 51 times [2023-12-20 08:57:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:46,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879889311] [2023-12-20 08:57:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:46,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 10 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:58:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:06,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879889311] [2023-12-20 08:58:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879889311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739767969] [2023-12-20 08:58:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:58:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:06,546 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:58:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-20 08:58:07,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-20 08:58:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:58:07,069 WARN L260 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 340 conjunts are in the unsatisfiable core [2023-12-20 08:58:07,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:07,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 08:58:07,246 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 [2023-12-20 08:58:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:58:22,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:58:22,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 146 treesize of output 381 [2023-12-20 08:58:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 18 proven. 684 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-20 08:58:23,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-20 08:58:31,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 08:58:31,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-20 08:58:31,615 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 [2023-12-20 08:58:31,624 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 08:58:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:31,789 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 105 with TraceHistMax 18,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 211 known predicates. [2023-12-20 08:58:31,797 INFO L445 BasicCegarLoop]: Path program histogram: [51, 1, 1, 1] [2023-12-20 08:58:31,799 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 08:58:31,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 08:58:31 BoogieIcfgContainer [2023-12-20 08:58:31,800 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 08:58:31,800 INFO L158 Benchmark]: Toolchain (without parser) took 813545.69ms. Allocated memory was 237.0MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 185.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 307.3MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,800 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 08:58:31,800 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.69ms. Allocated memory is still 237.0MB. Free memory was 185.4MB in the beginning and 174.2MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,801 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.28ms. Allocated memory is still 237.0MB. Free memory was 174.2MB in the beginning and 172.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,801 INFO L158 Benchmark]: Boogie Preprocessor took 37.23ms. Allocated memory is still 237.0MB. Free memory was 172.6MB in the beginning and 170.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,801 INFO L158 Benchmark]: RCFGBuilder took 411.88ms. Allocated memory is still 237.0MB. Free memory was 170.6MB in the beginning and 157.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,801 INFO L158 Benchmark]: TraceAbstraction took 812844.37ms. Allocated memory was 237.0MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 156.7MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 279.0MB. Max. memory is 8.0GB. [2023-12-20 08:58:31,801 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.69ms. Allocated memory is still 237.0MB. Free memory was 185.4MB in the beginning and 174.2MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.28ms. Allocated memory is still 237.0MB. Free memory was 174.2MB in the beginning and 172.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.23ms. Allocated memory is still 237.0MB. Free memory was 172.6MB in the beginning and 170.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 411.88ms. Allocated memory is still 237.0MB. Free memory was 170.6MB in the beginning and 157.5MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 812844.37ms. Allocated memory was 237.0MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 156.7MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 279.0MB. 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 105 with TraceHistMax 18,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 211 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 812.8s, OverallIterations: 54, TraceHistogramMax: 18, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.0s, AutomataDifference: 423.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 4092 SdHoareTripleChecker+Valid, 81.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4092 mSDsluCounter, 5494 SdHoareTripleChecker+Invalid, 72.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5024 mSDsCounter, 15671 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101869 IncrementalHoareTripleChecker+Invalid, 117542 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15671 mSolverCounterUnsat, 470 mSDtfsCounter, 101869 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9132 GetRequests, 3721 SyntacticMatches, 650 SemanticMatches, 4761 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269986 ImplicationChecksByTransitivity, 548.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=46, InterpolantAutomatonStates: 2559, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.8s AutomataMinimizationTime, 53 MinimizatonAttempts, 973 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 316.0s InterpolantComputationTime, 6133 NumberOfCodeBlocks, 6044 NumberOfCodeBlocksAsserted, 236 NumberOfCheckSat, 9025 ConstructedInterpolants, 35 QuantifiedInterpolants, 152325 SizeOfPredicates, 323 NumberOfNonLiveVariables, 15664 ConjunctsInSsa, 3752 ConjunctsInUnsatCore, 153 InterpolantComputations, 3 PerfectInterpolantSequences, 25078/45355 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