/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:15:16,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:15:16,090 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 23:15:16,093 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:15:16,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:15:16,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:15:16,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:15:16,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:15:16,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:15:16,124 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:15:16,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:15:16,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:15:16,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:15:16,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:15:16,126 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:15:16,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:15:16,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:15:16,126 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:15:16,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:15:16,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:15:16,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:15:16,128 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:15:16,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:15:16,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:15:16,128 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:15:16,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:15:16,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:15:16,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:15:16,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:15:16,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:15:16,130 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:15:16,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:15:16,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:15:16,131 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:15:16,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:15:16,132 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:15:16,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:15:16,132 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 23:15:16,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:15:16,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:15:16,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:15:16,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:15:16,322 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:15:16,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-12-15 23:15:17,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:15:17,546 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:15:17,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-12-15 23:15:17,554 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aecea5d57/8dd48326f3c042eb968affc7692dee23/FLAG0226a654d [2023-12-15 23:15:17,564 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aecea5d57/8dd48326f3c042eb968affc7692dee23 [2023-12-15 23:15:17,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:15:17,567 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:15:17,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:15:17,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:15:17,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:15:17,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346a32bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17, skipping insertion in model container [2023-12-15 23:15:17,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:15:17,765 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-12-15 23:15:17,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:15:17,774 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:15:17,808 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-12-15 23:15:17,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:15:17,831 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:15:17,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17 WrapperNode [2023-12-15 23:15:17,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:15:17,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:15:17,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:15:17,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:15:17,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,867 INFO L138 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 274 [2023-12-15 23:15:17,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:15:17,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:15:17,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:15:17,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:15:17,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,885 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 23:15:17,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,889 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:15:17,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:15:17,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:15:17,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:15:17,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (1/1) ... [2023-12-15 23:15:17,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:15:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:17,922 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) [2023-12-15 23:15:17,944 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 [2023-12-15 23:15:17,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:15:17,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:15:17,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:15:17,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:15:18,013 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:15:18,014 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:15:18,268 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:15:18,305 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:15:18,305 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 23:15:18,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:18 BoogieIcfgContainer [2023-12-15 23:15:18,306 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:15:18,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:15:18,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:15:18,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:15:18,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:15:17" (1/3) ... [2023-12-15 23:15:18,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f98af8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:18, skipping insertion in model container [2023-12-15 23:15:18,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:15:17" (2/3) ... [2023-12-15 23:15:18,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f98af8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:15:18, skipping insertion in model container [2023-12-15 23:15:18,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:15:18" (3/3) ... [2023-12-15 23:15:18,312 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-12-15 23:15:18,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:15:18,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:15:18,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:15:18,374 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;@9d88f54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:15:18,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:15:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 63 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) [2023-12-15 23:15:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 23:15:18,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:18,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:18,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:18,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash -20322442, now seen corresponding path program 1 times [2023-12-15 23:15:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:18,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231926592] [2023-12-15 23:15:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:18,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231926592] [2023-12-15 23:15:18,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231926592] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:18,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:18,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 23:15:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854499666] [2023-12-15 23:15:18,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:18,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 23:15:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 23:15:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 23:15:18,589 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 63 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) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:18,612 INFO L93 Difference]: Finished difference Result 102 states and 172 transitions. [2023-12-15 23:15:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 23:15:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 23:15:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:18,629 INFO L225 Difference]: With dead ends: 102 [2023-12-15 23:15:18,629 INFO L226 Difference]: Without dead ends: 62 [2023-12-15 23:15:18,631 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 [2023-12-15 23:15:18,633 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:18,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-15 23:15:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-15 23:15:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.7377049180327868) internal successors, (106), 61 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 106 transitions. [2023-12-15 23:15:18,657 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 106 transitions. Word has length 18 [2023-12-15 23:15:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:18,657 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 106 transitions. [2023-12-15 23:15:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 106 transitions. [2023-12-15 23:15:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 23:15:18,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:18,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:18,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 23:15:18,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:18,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1300186120, now seen corresponding path program 1 times [2023-12-15 23:15:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194495446] [2023-12-15 23:15:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194495446] [2023-12-15 23:15:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194495446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:18,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:18,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 23:15:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291630004] [2023-12-15 23:15:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:18,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 23:15:18,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 23:15:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:15:18,827 INFO L87 Difference]: Start difference. First operand 62 states and 106 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:18,908 INFO L93 Difference]: Finished difference Result 135 states and 221 transitions. [2023-12-15 23:15:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 23:15:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 23:15:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:18,911 INFO L225 Difference]: With dead ends: 135 [2023-12-15 23:15:18,912 INFO L226 Difference]: Without dead ends: 97 [2023-12-15 23:15:18,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:15:18,913 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 55 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:18,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:15:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-15 23:15:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2023-12-15 23:15:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 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) [2023-12-15 23:15:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2023-12-15 23:15:18,919 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 18 [2023-12-15 23:15:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:18,919 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2023-12-15 23:15:18,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2023-12-15 23:15:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 23:15:18,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:18,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 23:15:18,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:18,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1316975187, now seen corresponding path program 1 times [2023-12-15 23:15:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:18,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431875366] [2023-12-15 23:15:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:19,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431875366] [2023-12-15 23:15:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431875366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146385416] [2023-12-15 23:15:19,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:19,066 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:19,243 INFO L93 Difference]: Finished difference Result 342 states and 531 transitions. [2023-12-15 23:15:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 23:15:19,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-15 23:15:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:19,249 INFO L225 Difference]: With dead ends: 342 [2023-12-15 23:15:19,249 INFO L226 Difference]: Without dead ends: 307 [2023-12-15 23:15:19,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-15 23:15:19,254 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 494 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:19,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 716 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:15:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-15 23:15:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 95. [2023-12-15 23:15:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.446808510638298) internal successors, (136), 94 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2023-12-15 23:15:19,274 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 40 [2023-12-15 23:15:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:19,274 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2023-12-15 23:15:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2023-12-15 23:15:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 23:15:19,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:19,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:19,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 23:15:19,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:19,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2133064515, now seen corresponding path program 1 times [2023-12-15 23:15:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:19,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924378810] [2023-12-15 23:15:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:19,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924378810] [2023-12-15 23:15:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924378810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:19,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812480137] [2023-12-15 23:15:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:19,337 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:19,353 INFO L93 Difference]: Finished difference Result 220 states and 335 transitions. [2023-12-15 23:15:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-15 23:15:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:19,354 INFO L225 Difference]: With dead ends: 220 [2023-12-15 23:15:19,354 INFO L226 Difference]: Without dead ends: 152 [2023-12-15 23:15:19,356 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 [2023-12-15 23:15:19,361 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 34 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:19,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-15 23:15:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-12-15 23:15:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.4899328859060403) internal successors, (222), 149 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2023-12-15 23:15:19,373 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 42 [2023-12-15 23:15:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:19,373 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2023-12-15 23:15:19,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2023-12-15 23:15:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 23:15:19,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:19,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:19,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-15 23:15:19,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:19,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2135209467, now seen corresponding path program 1 times [2023-12-15 23:15:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:19,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738350893] [2023-12-15 23:15:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:19,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738350893] [2023-12-15 23:15:19,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738350893] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:19,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:19,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:19,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899013055] [2023-12-15 23:15:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:19,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:19,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:19,572 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:19,666 INFO L93 Difference]: Finished difference Result 275 states and 418 transitions. [2023-12-15 23:15:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:15:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-15 23:15:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:19,667 INFO L225 Difference]: With dead ends: 275 [2023-12-15 23:15:19,667 INFO L226 Difference]: Without dead ends: 152 [2023-12-15 23:15:19,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-12-15 23:15:19,671 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 164 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:19,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-15 23:15:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-12-15 23:15:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2023-12-15 23:15:19,691 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 42 [2023-12-15 23:15:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:19,692 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2023-12-15 23:15:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2023-12-15 23:15:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 23:15:19,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:19,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:19,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 23:15:19,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:19,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1752940221, now seen corresponding path program 1 times [2023-12-15 23:15:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734911401] [2023-12-15 23:15:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:19,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734911401] [2023-12-15 23:15:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734911401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:19,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 23:15:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203939218] [2023-12-15 23:15:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 23:15:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:19,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 23:15:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:15:19,815 INFO L87 Difference]: Start difference. First operand 150 states and 220 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2023-12-15 23:15:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:19,833 INFO L93 Difference]: Finished difference Result 158 states and 229 transitions. [2023-12-15 23:15:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 23:15:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 43 [2023-12-15 23:15:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:19,834 INFO L225 Difference]: With dead ends: 158 [2023-12-15 23:15:19,834 INFO L226 Difference]: Without dead ends: 156 [2023-12-15 23:15:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 23:15:19,835 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:19,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 229 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-15 23:15:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2023-12-15 23:15:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.457516339869281) internal successors, (223), 153 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 223 transitions. [2023-12-15 23:15:19,862 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 223 transitions. Word has length 43 [2023-12-15 23:15:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:19,862 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 223 transitions. [2023-12-15 23:15:19,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2023-12-15 23:15:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 223 transitions. [2023-12-15 23:15:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-15 23:15:19,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:19,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 23:15:19,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:19,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1574505819, now seen corresponding path program 1 times [2023-12-15 23:15:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937345479] [2023-12-15 23:15:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937345479] [2023-12-15 23:15:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937345479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:19,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:19,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:19,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678422932] [2023-12-15 23:15:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:19,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:19,945 INFO L87 Difference]: Start difference. First operand 154 states and 223 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:19,958 INFO L93 Difference]: Finished difference Result 292 states and 436 transitions. [2023-12-15 23:15:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 44 [2023-12-15 23:15:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:19,959 INFO L225 Difference]: With dead ends: 292 [2023-12-15 23:15:19,959 INFO L226 Difference]: Without dead ends: 220 [2023-12-15 23:15:19,959 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 [2023-12-15 23:15:19,959 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:19,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-12-15 23:15:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2023-12-15 23:15:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.4746543778801844) internal successors, (320), 217 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 320 transitions. [2023-12-15 23:15:19,966 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 320 transitions. Word has length 44 [2023-12-15 23:15:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:19,966 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 320 transitions. [2023-12-15 23:15:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 320 transitions. [2023-12-15 23:15:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-15 23:15:19,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:19,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-15 23:15:19,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:19,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 988793691, now seen corresponding path program 1 times [2023-12-15 23:15:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:19,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358215427] [2023-12-15 23:15:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:20,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358215427] [2023-12-15 23:15:20,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358215427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:20,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:20,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:20,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790314982] [2023-12-15 23:15:20,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:20,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:20,029 INFO L87 Difference]: Start difference. First operand 218 states and 320 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:20,045 INFO L93 Difference]: Finished difference Result 572 states and 860 transitions. [2023-12-15 23:15:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 44 [2023-12-15 23:15:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:20,047 INFO L225 Difference]: With dead ends: 572 [2023-12-15 23:15:20,047 INFO L226 Difference]: Without dead ends: 383 [2023-12-15 23:15:20,047 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 [2023-12-15 23:15:20,049 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:20,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 176 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-12-15 23:15:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2023-12-15 23:15:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4789473684210526) internal successors, (562), 380 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 562 transitions. [2023-12-15 23:15:20,058 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 562 transitions. Word has length 44 [2023-12-15 23:15:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:20,058 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 562 transitions. [2023-12-15 23:15:20,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 562 transitions. [2023-12-15 23:15:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-15 23:15:20,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:20,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-15 23:15:20,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:20,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1877527131, now seen corresponding path program 1 times [2023-12-15 23:15:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794978068] [2023-12-15 23:15:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794978068] [2023-12-15 23:15:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794978068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:20,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325774134] [2023-12-15 23:15:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:20,115 INFO L87 Difference]: Start difference. First operand 381 states and 562 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:20,139 INFO L93 Difference]: Finished difference Result 1037 states and 1544 transitions. [2023-12-15 23:15:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 44 [2023-12-15 23:15:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:20,144 INFO L225 Difference]: With dead ends: 1037 [2023-12-15 23:15:20,145 INFO L226 Difference]: Without dead ends: 685 [2023-12-15 23:15:20,147 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 [2023-12-15 23:15:20,148 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:20,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-12-15 23:15:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2023-12-15 23:15:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 1.4633431085043989) internal successors, (998), 682 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 998 transitions. [2023-12-15 23:15:20,167 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 998 transitions. Word has length 44 [2023-12-15 23:15:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:20,169 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 998 transitions. [2023-12-15 23:15:20,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 998 transitions. [2023-12-15 23:15:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-15 23:15:20,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:20,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-15 23:15:20,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:20,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1614449755, now seen corresponding path program 1 times [2023-12-15 23:15:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656071788] [2023-12-15 23:15:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:20,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656071788] [2023-12-15 23:15:20,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656071788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:20,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:20,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34418733] [2023-12-15 23:15:20,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:20,198 INFO L87 Difference]: Start difference. First operand 683 states and 998 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:20,230 INFO L93 Difference]: Finished difference Result 1895 states and 2768 transitions. [2023-12-15 23:15:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 44 [2023-12-15 23:15:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:20,234 INFO L225 Difference]: With dead ends: 1895 [2023-12-15 23:15:20,234 INFO L226 Difference]: Without dead ends: 1241 [2023-12-15 23:15:20,235 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 [2023-12-15 23:15:20,235 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:20,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 182 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-12-15 23:15:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1239. [2023-12-15 23:15:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.432956381260097) internal successors, (1774), 1238 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1774 transitions. [2023-12-15 23:15:20,269 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1774 transitions. Word has length 44 [2023-12-15 23:15:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:20,270 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1774 transitions. [2023-12-15 23:15:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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) [2023-12-15 23:15:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1774 transitions. [2023-12-15 23:15:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 23:15:20,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:20,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:20,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-15 23:15:20,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:20,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash -712030863, now seen corresponding path program 1 times [2023-12-15 23:15:20,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:20,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111437754] [2023-12-15 23:15:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 23:15:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111437754] [2023-12-15 23:15:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111437754] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:20,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110463105] [2023-12-15 23:15:20,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:20,368 INFO L87 Difference]: Start difference. First operand 1239 states and 1774 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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) [2023-12-15 23:15:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:20,549 INFO L93 Difference]: Finished difference Result 6001 states and 8635 transitions. [2023-12-15 23:15:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:15:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 60 [2023-12-15 23:15:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:20,562 INFO L225 Difference]: With dead ends: 6001 [2023-12-15 23:15:20,563 INFO L226 Difference]: Without dead ends: 5135 [2023-12-15 23:15:20,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:15:20,565 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 321 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:20,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 422 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2023-12-15 23:15:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 2279. [2023-12-15 23:15:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.4284460052677788) internal successors, (3254), 2278 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3254 transitions. [2023-12-15 23:15:20,648 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3254 transitions. Word has length 60 [2023-12-15 23:15:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:20,648 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 3254 transitions. [2023-12-15 23:15:20,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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) [2023-12-15 23:15:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3254 transitions. [2023-12-15 23:15:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 23:15:20,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:20,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:20,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-15 23:15:20,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:20,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1297742991, now seen corresponding path program 1 times [2023-12-15 23:15:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61622033] [2023-12-15 23:15:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 23:15:20,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:20,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61622033] [2023-12-15 23:15:20,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61622033] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:20,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:20,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:20,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205014292] [2023-12-15 23:15:20,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:20,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:20,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:20,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:20,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:20,734 INFO L87 Difference]: Start difference. First operand 2279 states and 3254 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:20,895 INFO L93 Difference]: Finished difference Result 7209 states and 10363 transitions. [2023-12-15 23:15:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:15:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2023-12-15 23:15:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:20,908 INFO L225 Difference]: With dead ends: 7209 [2023-12-15 23:15:20,908 INFO L226 Difference]: Without dead ends: 5999 [2023-12-15 23:15:20,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:15:20,913 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 358 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:20,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 427 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2023-12-15 23:15:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 3919. [2023-12-15 23:15:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.4247064828994385) internal successors, (5582), 3918 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 5582 transitions. [2023-12-15 23:15:21,048 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 5582 transitions. Word has length 60 [2023-12-15 23:15:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:21,049 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 5582 transitions. [2023-12-15 23:15:21,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 5582 transitions. [2023-12-15 23:15:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 23:15:21,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:21,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-15 23:15:21,050 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:21,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash -409009551, now seen corresponding path program 1 times [2023-12-15 23:15:21,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:21,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595522790] [2023-12-15 23:15:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:21,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 23:15:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595522790] [2023-12-15 23:15:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595522790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:21,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055560008] [2023-12-15 23:15:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:21,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:21,116 INFO L87 Difference]: Start difference. First operand 3919 states and 5582 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:21,285 INFO L93 Difference]: Finished difference Result 8417 states and 12083 transitions. [2023-12-15 23:15:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:15:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2023-12-15 23:15:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:21,303 INFO L225 Difference]: With dead ends: 8417 [2023-12-15 23:15:21,303 INFO L226 Difference]: Without dead ends: 7207 [2023-12-15 23:15:21,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:15:21,307 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 353 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:21,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 441 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2023-12-15 23:15:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 5127. [2023-12-15 23:15:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5127 states, 5126 states have (on average 1.424502536090519) internal successors, (7302), 5126 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5127 states to 5127 states and 7302 transitions. [2023-12-15 23:15:21,456 INFO L78 Accepts]: Start accepts. Automaton has 5127 states and 7302 transitions. Word has length 60 [2023-12-15 23:15:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:21,456 INFO L495 AbstractCegarLoop]: Abstraction has 5127 states and 7302 transitions. [2023-12-15 23:15:21,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 5127 states and 7302 transitions. [2023-12-15 23:15:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 23:15:21,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:21,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-15 23:15:21,457 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:21,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash -672086927, now seen corresponding path program 1 times [2023-12-15 23:15:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002575397] [2023-12-15 23:15:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 23:15:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002575397] [2023-12-15 23:15:21,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002575397] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:21,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:21,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 23:15:21,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863358767] [2023-12-15 23:15:21,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:21,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:15:21,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:21,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:15:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:15:21,524 INFO L87 Difference]: Start difference. First operand 5127 states and 7302 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-12-15 23:15:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:21,744 INFO L93 Difference]: Finished difference Result 9625 states and 13803 transitions. [2023-12-15 23:15:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:15:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 60 [2023-12-15 23:15:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:21,774 INFO L225 Difference]: With dead ends: 9625 [2023-12-15 23:15:21,774 INFO L226 Difference]: Without dead ends: 8415 [2023-12-15 23:15:21,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:15:21,777 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 323 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:21,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 473 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:15:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2023-12-15 23:15:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 6335. [2023-12-15 23:15:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 1.4243763814335333) internal successors, (9022), 6334 states have internal predecessors, (9022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 9022 transitions. [2023-12-15 23:15:21,951 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 9022 transitions. Word has length 60 [2023-12-15 23:15:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:21,951 INFO L495 AbstractCegarLoop]: Abstraction has 6335 states and 9022 transitions. [2023-12-15 23:15:21,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-12-15 23:15:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 9022 transitions. [2023-12-15 23:15:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-15 23:15:21,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:21,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:21,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-15 23:15:21,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:21,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 429122550, now seen corresponding path program 1 times [2023-12-15 23:15:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541019216] [2023-12-15 23:15:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541019216] [2023-12-15 23:15:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541019216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811415515] [2023-12-15 23:15:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:22,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:22,032 INFO L87 Difference]: Start difference. First operand 6335 states and 9022 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:22,159 INFO L93 Difference]: Finished difference Result 12643 states and 18016 transitions. [2023-12-15 23:15:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-15 23:15:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:22,168 INFO L225 Difference]: With dead ends: 12643 [2023-12-15 23:15:22,168 INFO L226 Difference]: Without dead ends: 6337 [2023-12-15 23:15:22,175 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 [2023-12-15 23:15:22,175 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:22,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 176 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2023-12-15 23:15:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6335. [2023-12-15 23:15:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 1.4047994947900222) internal successors, (8898), 6334 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 8898 transitions. [2023-12-15 23:15:22,304 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 8898 transitions. Word has length 61 [2023-12-15 23:15:22,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:22,305 INFO L495 AbstractCegarLoop]: Abstraction has 6335 states and 8898 transitions. [2023-12-15 23:15:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 8898 transitions. [2023-12-15 23:15:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-15 23:15:22,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:22,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:22,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-15 23:15:22,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:22,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1906964633, now seen corresponding path program 1 times [2023-12-15 23:15:22,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:22,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86759481] [2023-12-15 23:15:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:22,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:22,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86759481] [2023-12-15 23:15:22,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86759481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:22,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188225311] [2023-12-15 23:15:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:22,347 INFO L87 Difference]: Start difference. First operand 6335 states and 8898 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:22,413 INFO L93 Difference]: Finished difference Result 8731 states and 12305 transitions. [2023-12-15 23:15:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-15 23:15:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:22,416 INFO L225 Difference]: With dead ends: 8731 [2023-12-15 23:15:22,416 INFO L226 Difference]: Without dead ends: 2425 [2023-12-15 23:15:22,419 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 [2023-12-15 23:15:22,419 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:22,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2023-12-15 23:15:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2418. [2023-12-15 23:15:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 1.4004964832436906) internal successors, (3385), 2417 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3385 transitions. [2023-12-15 23:15:22,461 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3385 transitions. Word has length 62 [2023-12-15 23:15:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:22,461 INFO L495 AbstractCegarLoop]: Abstraction has 2418 states and 3385 transitions. [2023-12-15 23:15:22,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3385 transitions. [2023-12-15 23:15:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-15 23:15:22,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:22,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:22,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-15 23:15:22,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:22,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash 438272804, now seen corresponding path program 1 times [2023-12-15 23:15:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:22,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316627606] [2023-12-15 23:15:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:22,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:22,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:22,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316627606] [2023-12-15 23:15:22,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316627606] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:22,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:22,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:22,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705628484] [2023-12-15 23:15:22,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:22,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:22,503 INFO L87 Difference]: Start difference. First operand 2418 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2023-12-15 23:15:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:22,529 INFO L93 Difference]: Finished difference Result 3610 states and 5059 transitions. [2023-12-15 23:15:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 63 [2023-12-15 23:15:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:22,530 INFO L225 Difference]: With dead ends: 3610 [2023-12-15 23:15:22,530 INFO L226 Difference]: Without dead ends: 1232 [2023-12-15 23:15:22,532 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 [2023-12-15 23:15:22,532 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 33 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:22,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 152 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-12-15 23:15:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1230. [2023-12-15 23:15:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.3759153783563873) internal successors, (1691), 1229 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1691 transitions. [2023-12-15 23:15:22,553 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1691 transitions. Word has length 63 [2023-12-15 23:15:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:22,553 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1691 transitions. [2023-12-15 23:15:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2023-12-15 23:15:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1691 transitions. [2023-12-15 23:15:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-15 23:15:22,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:22,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:22,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-15 23:15:22,554 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:22,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash 888337362, now seen corresponding path program 1 times [2023-12-15 23:15:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690017179] [2023-12-15 23:15:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:22,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:22,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690017179] [2023-12-15 23:15:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690017179] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:15:22,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:15:22,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:15:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005984251] [2023-12-15 23:15:22,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:15:22,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:15:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:15:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:15:22,595 INFO L87 Difference]: Start difference. First operand 1230 states and 1691 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:22,610 INFO L93 Difference]: Finished difference Result 1828 states and 2518 transitions. [2023-12-15 23:15:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:15:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2023-12-15 23:15:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:22,611 INFO L225 Difference]: With dead ends: 1828 [2023-12-15 23:15:22,611 INFO L226 Difference]: Without dead ends: 638 [2023-12-15 23:15:22,612 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 [2023-12-15 23:15:22,612 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 30 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:22,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:15:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-12-15 23:15:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2023-12-15 23:15:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3464566929133859) internal successors, (855), 635 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 855 transitions. [2023-12-15 23:15:22,623 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 855 transitions. Word has length 65 [2023-12-15 23:15:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:22,623 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 855 transitions. [2023-12-15 23:15:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 855 transitions. [2023-12-15 23:15:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 23:15:22,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:22,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:22,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-15 23:15:22,624 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:22,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1624577536, now seen corresponding path program 1 times [2023-12-15 23:15:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695708453] [2023-12-15 23:15:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 23:15:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695708453] [2023-12-15 23:15:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695708453] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:15:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358612240] [2023-12-15 23:15:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:22,698 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) [2023-12-15 23:15:22,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 23:15:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:22,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-15 23:15:22,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:15:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:22,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:15:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358612240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:15:23,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:15:23,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-12-15 23:15:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091824859] [2023-12-15 23:15:23,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:15:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 23:15:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 23:15:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-12-15 23:15:23,293 INFO L87 Difference]: Start difference. First operand 636 states and 855 transitions. Second operand has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:23,443 INFO L93 Difference]: Finished difference Result 2616 states and 3524 transitions. [2023-12-15 23:15:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 23:15:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 0 states have call successors, (0), 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 [2023-12-15 23:15:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:23,446 INFO L225 Difference]: With dead ends: 2616 [2023-12-15 23:15:23,446 INFO L226 Difference]: Without dead ends: 1996 [2023-12-15 23:15:23,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-15 23:15:23,448 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 290 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:23,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 619 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:15:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-12-15 23:15:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1947. [2023-12-15 23:15:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 1.3088386433710175) internal successors, (2547), 1946 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2547 transitions. [2023-12-15 23:15:23,498 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2547 transitions. Word has length 67 [2023-12-15 23:15:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:23,498 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2547 transitions. [2023-12-15 23:15:23,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2547 transitions. [2023-12-15 23:15:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-15 23:15:23,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:23,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:23,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 23:15:23,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:23,706 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:23,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash 385389775, now seen corresponding path program 1 times [2023-12-15 23:15:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162864656] [2023-12-15 23:15:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:24,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:24,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162864656] [2023-12-15 23:15:24,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162864656] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:15:24,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224752771] [2023-12-15 23:15:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:24,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:24,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:24,020 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) [2023-12-15 23:15:24,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 23:15:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-15 23:15:24,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:15:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:24,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:15:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224752771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:15:24,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:15:24,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-12-15 23:15:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138845695] [2023-12-15 23:15:24,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:15:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 23:15:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 23:15:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2023-12-15 23:15:24,868 INFO L87 Difference]: Start difference. First operand 1947 states and 2547 transitions. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:25,972 INFO L93 Difference]: Finished difference Result 9817 states and 12822 transitions. [2023-12-15 23:15:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-15 23:15:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-15 23:15:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:25,981 INFO L225 Difference]: With dead ends: 9817 [2023-12-15 23:15:25,981 INFO L226 Difference]: Without dead ends: 7930 [2023-12-15 23:15:25,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 23:15:25,984 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1431 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:25,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 825 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 23:15:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7930 states. [2023-12-15 23:15:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7930 to 7438. [2023-12-15 23:15:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 1.2830442382681189) internal successors, (9542), 7437 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 9542 transitions. [2023-12-15 23:15:26,185 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 9542 transitions. Word has length 68 [2023-12-15 23:15:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:26,185 INFO L495 AbstractCegarLoop]: Abstraction has 7438 states and 9542 transitions. [2023-12-15 23:15:26,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 9542 transitions. [2023-12-15 23:15:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-15 23:15:26,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:26,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:26,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 23:15:26,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-15 23:15:26,395 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:26,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:26,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1811367197, now seen corresponding path program 1 times [2023-12-15 23:15:26,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:26,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901338467] [2023-12-15 23:15:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:26,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:26,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901338467] [2023-12-15 23:15:26,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901338467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:15:26,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352774757] [2023-12-15 23:15:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:26,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:26,690 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) [2023-12-15 23:15:26,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 23:15:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:26,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-15 23:15:26,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:15:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:27,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:15:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:27,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352774757] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:15:27,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:15:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-12-15 23:15:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240074576] [2023-12-15 23:15:27,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:15:27,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 23:15:27,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 23:15:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-12-15 23:15:27,667 INFO L87 Difference]: Start difference. First operand 7438 states and 9542 transitions. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 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) [2023-12-15 23:15:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:28,178 INFO L93 Difference]: Finished difference Result 21878 states and 28082 transitions. [2023-12-15 23:15:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 23:15:28,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 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) Word has length 68 [2023-12-15 23:15:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:28,197 INFO L225 Difference]: With dead ends: 21878 [2023-12-15 23:15:28,197 INFO L226 Difference]: Without dead ends: 15581 [2023-12-15 23:15:28,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-12-15 23:15:28,203 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 413 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:28,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 378 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:15:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15581 states. [2023-12-15 23:15:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15581 to 14849. [2023-12-15 23:15:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14849 states, 14848 states have (on average 1.2646821120689655) internal successors, (18778), 14848 states have internal predecessors, (18778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14849 states to 14849 states and 18778 transitions. [2023-12-15 23:15:28,576 INFO L78 Accepts]: Start accepts. Automaton has 14849 states and 18778 transitions. Word has length 68 [2023-12-15 23:15:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:28,576 INFO L495 AbstractCegarLoop]: Abstraction has 14849 states and 18778 transitions. [2023-12-15 23:15:28,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 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) [2023-12-15 23:15:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14849 states and 18778 transitions. [2023-12-15 23:15:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-15 23:15:28,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:28,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:28,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 23:15:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:28,782 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:28,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1542445746, now seen corresponding path program 1 times [2023-12-15 23:15:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368324376] [2023-12-15 23:15:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:29,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:29,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368324376] [2023-12-15 23:15:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368324376] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:15:29,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457905308] [2023-12-15 23:15:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:29,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:29,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:29,009 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) [2023-12-15 23:15:29,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 23:15:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:29,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-15 23:15:29,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:15:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:29,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:15:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457905308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:15:30,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:15:30,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 30 [2023-12-15 23:15:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737976699] [2023-12-15 23:15:30,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:15:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 23:15:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 23:15:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2023-12-15 23:15:30,358 INFO L87 Difference]: Start difference. First operand 14849 states and 18778 transitions. Second operand has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:15:31,585 INFO L93 Difference]: Finished difference Result 44914 states and 56753 transitions. [2023-12-15 23:15:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-15 23:15:31,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 0 states have call successors, (0), 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 [2023-12-15 23:15:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:15:31,638 INFO L225 Difference]: With dead ends: 44914 [2023-12-15 23:15:31,638 INFO L226 Difference]: Without dead ends: 31813 [2023-12-15 23:15:31,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 23:15:31,652 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 516 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 23:15:31,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 516 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 23:15:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31813 states. [2023-12-15 23:15:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31813 to 29737. [2023-12-15 23:15:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29737 states, 29736 states have (on average 1.2487220877051386) internal successors, (37132), 29736 states have internal predecessors, (37132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29737 states to 29737 states and 37132 transitions. [2023-12-15 23:15:32,390 INFO L78 Accepts]: Start accepts. Automaton has 29737 states and 37132 transitions. Word has length 69 [2023-12-15 23:15:32,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:15:32,390 INFO L495 AbstractCegarLoop]: Abstraction has 29737 states and 37132 transitions. [2023-12-15 23:15:32,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:15:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29737 states and 37132 transitions. [2023-12-15 23:15:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-15 23:15:32,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:15:32,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:15:32,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 23:15:32,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:32,597 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:15:32,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:15:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -129186099, now seen corresponding path program 1 times [2023-12-15 23:15:32,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:15:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828443318] [2023-12-15 23:15:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:15:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:15:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828443318] [2023-12-15 23:15:34,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828443318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:15:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788354851] [2023-12-15 23:15:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:15:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:15:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:15:34,228 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) [2023-12-15 23:15:34,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 23:15:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:15:34,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-15 23:15:34,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:15:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:37,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:15:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:15:40,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788354851] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:15:40,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:15:40,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 65 [2023-12-15 23:15:40,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329317516] [2023-12-15 23:15:40,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:15:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-15 23:15:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:15:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-15 23:15:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3838, Unknown=0, NotChecked=0, Total=4160 [2023-12-15 23:15:40,833 INFO L87 Difference]: Start difference. First operand 29737 states and 37132 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-15 23:16:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-12-15 23:16:25,348 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 [2023-12-15 23:16:25,348 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:16:25,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8189 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=4768, Invalid=27452, Unknown=0, NotChecked=0, Total=32220 [2023-12-15 23:16:25,353 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2439 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 3219 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2439 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-15 23:16:25,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2439 Valid, 2534 Invalid, 3355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3219 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-15 23:16:25,355 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:16:25,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 23:16:25,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-15 23:16:25,561 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (29737states) and FLOYD_HOARE automaton (currently 117 states, 65 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 180 known predicates. [2023-12-15 23:16:25,564 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:16:25,565 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:16:25,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:16:25 BoogieIcfgContainer [2023-12-15 23:16:25,567 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:16:25,567 INFO L158 Benchmark]: Toolchain (without parser) took 68000.20ms. Allocated memory was 216.0MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 160.3MB in the beginning and 1.1GB in the end (delta: -903.9MB). Peak memory consumption was 362.1MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,567 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 216.0MB. Free memory is still 164.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:16:25,567 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.95ms. Allocated memory is still 216.0MB. Free memory was 160.3MB in the beginning and 145.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,567 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.78ms. Allocated memory is still 216.0MB. Free memory was 145.7MB in the beginning and 143.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,568 INFO L158 Benchmark]: Boogie Preprocessor took 28.87ms. Allocated memory is still 216.0MB. Free memory was 143.2MB in the beginning and 140.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,568 INFO L158 Benchmark]: RCFGBuilder took 409.05ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 140.8MB in the beginning and 221.2MB in the end (delta: -80.4MB). Peak memory consumption was 33.4MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,568 INFO L158 Benchmark]: TraceAbstraction took 67258.49ms. Allocated memory was 260.0MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 220.1MB in the beginning and 1.1GB in the end (delta: -844.1MB). Peak memory consumption was 377.0MB. Max. memory is 8.0GB. [2023-12-15 23:16:25,569 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 216.0MB. Free memory is still 164.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 261.95ms. Allocated memory is still 216.0MB. Free memory was 160.3MB in the beginning and 145.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.78ms. Allocated memory is still 216.0MB. Free memory was 145.7MB in the beginning and 143.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.87ms. Allocated memory is still 216.0MB. Free memory was 143.2MB in the beginning and 140.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 409.05ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 140.8MB in the beginning and 221.2MB in the end (delta: -80.4MB). Peak memory consumption was 33.4MB. Max. memory is 8.0GB. * TraceAbstraction took 67258.49ms. Allocated memory was 260.0MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 220.1MB in the beginning and 1.1GB in the end (delta: -844.1MB). Peak memory consumption was 377.0MB. 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: 349]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 349). Cancelled while NwaCegarLoop was constructing difference of abstraction (29737states) and FLOYD_HOARE automaton (currently 117 states, 65 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 180 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.2s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 49.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7495 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7495 mSDsluCounter, 9666 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7395 mSDsCounter, 230 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5711 IncrementalHoareTripleChecker+Invalid, 5941 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 230 mSolverCounterUnsat, 2271 mSDtfsCounter, 5711 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 991 GetRequests, 621 SyntacticMatches, 1 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 47.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29737occurred in iteration=22, InterpolantAutomatonStates: 151, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 12719 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 1554 NumberOfCodeBlocks, 1554 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1863 ConstructedInterpolants, 0 QuantifiedInterpolants, 22891 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1469 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 33 InterpolantComputations, 18 PerfectInterpolantSequences, 193/296 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