/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/bitvector/byte_add_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 11:02:51,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 11:02:51,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 11:02:51,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 11:02:51,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 11:02:51,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 11:02:51,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 11:02:51,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 11:02:51,841 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 11:02:51,841 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 11:02:51,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 11:02:51,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 11:02:51,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 11:02:51,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 11:02:51,843 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 11:02:51,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 11:02:51,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 11:02:51,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 11:02:51,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 11:02:51,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 11:02:51,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 11:02:51,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 11:02:51,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 11:02:51,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 11:02:51,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 11:02:51,846 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 11:02:51,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 11:02:51,846 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 11:02:51,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 11:02:51,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 11:02:51,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 11:02:51,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 11:02:51,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 11:02:51,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 11:02:51,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 11:02:51,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 11:02:51,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 11:02:51,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 11:02:51,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 11:02:51,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 11:02:51,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 11:02:51,851 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 11:02:51,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 11:02:51,851 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 11:02:51,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 11:02:52,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 11:02:52,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 11:02:52,007 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 11:02:52,007 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 11:02:52,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/byte_add_2-2.i [2023-12-20 11:02:53,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 11:02:53,312 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 11:02:53,312 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i [2023-12-20 11:02:53,321 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d421af585/720cdea9177344d9942d929d2671b73a/FLAGdf16e3d72 [2023-12-20 11:02:53,333 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d421af585/720cdea9177344d9942d929d2671b73a [2023-12-20 11:02:53,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 11:02:53,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 11:02:53,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 11:02:53,338 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 11:02:53,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 11:02:53,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27850339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53, skipping insertion in model container [2023-12-20 11:02:53,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 11:02:53,478 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2023-12-20 11:02:53,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 11:02:53,528 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 11:02:53,536 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/byte_add_2-2.i[1168,1181] [2023-12-20 11:02:53,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 11:02:53,586 INFO L206 MainTranslator]: Completed translation [2023-12-20 11:02:53,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53 WrapperNode [2023-12-20 11:02:53,587 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 11:02:53,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 11:02:53,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 11:02:53,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 11:02:53,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,618 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-12-20 11:02:53,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 11:02:53,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 11:02:53,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 11:02:53,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 11:02:53,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,638 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]. [2023-12-20 11:02:53,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 11:02:53,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 11:02:53,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 11:02:53,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 11:02:53,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (1/1) ... [2023-12-20 11:02:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 11:02:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:53,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 11:02:53,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 11:02:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 11:02:53,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 11:02:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 11:02:53,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 11:02:53,816 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 11:02:53,817 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 11:02:54,042 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 11:02:54,060 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 11:02:54,061 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 11:02:54,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 11:02:54 BoogieIcfgContainer [2023-12-20 11:02:54,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 11:02:54,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 11:02:54,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 11:02:54,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 11:02:54,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 11:02:53" (1/3) ... [2023-12-20 11:02:54,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f8e13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 11:02:54, skipping insertion in model container [2023-12-20 11:02:54,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 11:02:53" (2/3) ... [2023-12-20 11:02:54,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f8e13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 11:02:54, skipping insertion in model container [2023-12-20 11:02:54,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 11:02:54" (3/3) ... [2023-12-20 11:02:54,067 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2023-12-20 11:02:54,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 11:02:54,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 11:02:54,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 11:02:54,124 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;@4215154b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 11:02:54,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 11:02:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 11:02:54,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:54,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:54,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 459643034, now seen corresponding path program 1 times [2023-12-20 11:02:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:54,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176733112] [2023-12-20 11:02:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:54,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:54,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176733112] [2023-12-20 11:02:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176733112] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:54,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 11:02:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723833819] [2023-12-20 11:02:54,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:54,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 11:02:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 11:02:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 11:02:54,360 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:54,385 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2023-12-20 11:02:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 11:02:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-20 11:02:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:54,416 INFO L225 Difference]: With dead ends: 50 [2023-12-20 11:02:54,420 INFO L226 Difference]: Without dead ends: 36 [2023-12-20 11:02:54,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 11:02:54,431 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:54,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:02:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-20 11:02:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-20 11:02:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 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) [2023-12-20 11:02:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 62 transitions. [2023-12-20 11:02:54,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 62 transitions. Word has length 10 [2023-12-20 11:02:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:54,459 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 62 transitions. [2023-12-20 11:02:54,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 62 transitions. [2023-12-20 11:02:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 11:02:54,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:54,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:54,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 11:02:54,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:54,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 371044600, now seen corresponding path program 1 times [2023-12-20 11:02:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:54,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021200595] [2023-12-20 11:02:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:54,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:54,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021200595] [2023-12-20 11:02:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021200595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:54,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 11:02:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057989486] [2023-12-20 11:02:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 11:02:54,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 11:02:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 11:02:54,596 INFO L87 Difference]: Start difference. First operand 36 states and 62 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:54,709 INFO L93 Difference]: Finished difference Result 86 states and 153 transitions. [2023-12-20 11:02:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 11:02:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-20 11:02:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:54,712 INFO L225 Difference]: With dead ends: 86 [2023-12-20 11:02:54,715 INFO L226 Difference]: Without dead ends: 59 [2023-12-20 11:02:54,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 11:02:54,716 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:54,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-20 11:02:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-12-20 11:02:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 87 transitions. [2023-12-20 11:02:54,725 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 87 transitions. Word has length 10 [2023-12-20 11:02:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:54,725 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 87 transitions. [2023-12-20 11:02:54,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 87 transitions. [2023-12-20 11:02:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 11:02:54,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:54,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:54,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 11:02:54,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:54,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1656804765, now seen corresponding path program 1 times [2023-12-20 11:02:54,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:54,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034002553] [2023-12-20 11:02:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:54,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 11:02:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034002553] [2023-12-20 11:02:54,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034002553] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:54,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:54,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 11:02:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726357242] [2023-12-20 11:02:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 11:02:54,869 INFO L87 Difference]: Start difference. First operand 57 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:55,026 INFO L93 Difference]: Finished difference Result 136 states and 212 transitions. [2023-12-20 11:02:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:02:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-12-20 11:02:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:55,027 INFO L225 Difference]: With dead ends: 136 [2023-12-20 11:02:55,027 INFO L226 Difference]: Without dead ends: 99 [2023-12-20 11:02:55,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:02:55,028 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 82 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:55,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 138 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-20 11:02:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2023-12-20 11:02:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-12-20 11:02:55,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-12-20 11:02:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:55,034 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-12-20 11:02:55,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-12-20 11:02:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 11:02:55,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:55,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 11:02:55,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:55,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 662822522, now seen corresponding path program 1 times [2023-12-20 11:02:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:55,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312817521] [2023-12-20 11:02:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 11:02:55,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312817521] [2023-12-20 11:02:55,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312817521] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:55,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:55,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 11:02:55,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106383465] [2023-12-20 11:02:55,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:55,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 11:02:55,119 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:55,236 INFO L93 Difference]: Finished difference Result 162 states and 244 transitions. [2023-12-20 11:02:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:02:55,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2023-12-20 11:02:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:55,238 INFO L225 Difference]: With dead ends: 162 [2023-12-20 11:02:55,238 INFO L226 Difference]: Without dead ends: 119 [2023-12-20 11:02:55,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:02:55,240 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 86 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:55,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 146 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-20 11:02:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2023-12-20 11:02:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-12-20 11:02:55,245 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 17 [2023-12-20 11:02:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:55,245 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-12-20 11:02:55,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-12-20 11:02:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 11:02:55,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:55,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:55,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 11:02:55,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:55,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1401335308, now seen corresponding path program 1 times [2023-12-20 11:02:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:55,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655102046] [2023-12-20 11:02:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:55,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:55,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655102046] [2023-12-20 11:02:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655102046] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:02:55,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35648075] [2023-12-20 11:02:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:55,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:55,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:02:55,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 11:02:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:55,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 11:02:55,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:02:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:55,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:02:55,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35648075] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:55,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:02:55,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-20 11:02:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071496768] [2023-12-20 11:02:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:55,421 INFO L87 Difference]: Start difference. First operand 75 states and 109 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) [2023-12-20 11:02:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:55,570 INFO L93 Difference]: Finished difference Result 143 states and 234 transitions. [2023-12-20 11:02:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:02:55,570 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 [2023-12-20 11:02:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:55,571 INFO L225 Difference]: With dead ends: 143 [2023-12-20 11:02:55,571 INFO L226 Difference]: Without dead ends: 116 [2023-12-20 11:02:55,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:55,572 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:55,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-20 11:02:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2023-12-20 11:02:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.402061855670103) internal successors, (136), 97 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) [2023-12-20 11:02:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2023-12-20 11:02:55,578 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 18 [2023-12-20 11:02:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:55,578 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2023-12-20 11:02:55,578 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) [2023-12-20 11:02:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2023-12-20 11:02:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 11:02:55,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:55,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:55,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 11:02:55,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:55,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:55,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash 332112547, now seen corresponding path program 1 times [2023-12-20 11:02:55,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:55,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040514086] [2023-12-20 11:02:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:55,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:55,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040514086] [2023-12-20 11:02:55,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040514086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:02:55,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890334991] [2023-12-20 11:02:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:55,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:02:55,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 11:02:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:55,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 11:02:55,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:02:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 11:02:55,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:02:55,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890334991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:55,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:02:55,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-12-20 11:02:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817005474] [2023-12-20 11:02:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:55,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:55,945 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:56,082 INFO L93 Difference]: Finished difference Result 209 states and 310 transitions. [2023-12-20 11:02:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:02:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-20 11:02:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:56,083 INFO L225 Difference]: With dead ends: 209 [2023-12-20 11:02:56,083 INFO L226 Difference]: Without dead ends: 143 [2023-12-20 11:02:56,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:56,086 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 37 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:56,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 98 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-20 11:02:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2023-12-20 11:02:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3583333333333334) internal successors, (163), 120 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2023-12-20 11:02:56,098 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 24 [2023-12-20 11:02:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:56,098 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2023-12-20 11:02:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2023-12-20 11:02:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 11:02:56,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:56,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:56,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 11:02:56,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-20 11:02:56,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:56,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:56,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1216719026, now seen corresponding path program 1 times [2023-12-20 11:02:56,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:56,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506620950] [2023-12-20 11:02:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:56,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 11:02:56,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506620950] [2023-12-20 11:02:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506620950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:02:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600418728] [2023-12-20 11:02:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:56,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:56,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:56,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:02:56,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 11:02:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:56,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 11:02:56,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:02:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:02:56,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:02:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600418728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:56,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:02:56,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-20 11:02:56,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011520743] [2023-12-20 11:02:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:56,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:56,523 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:56,641 INFO L93 Difference]: Finished difference Result 255 states and 362 transitions. [2023-12-20 11:02:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 11:02:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-20 11:02:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:56,642 INFO L225 Difference]: With dead ends: 255 [2023-12-20 11:02:56,642 INFO L226 Difference]: Without dead ends: 166 [2023-12-20 11:02:56,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:56,644 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 36 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:56,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 98 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-20 11:02:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2023-12-20 11:02:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3286713286713288) internal successors, (190), 143 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) [2023-12-20 11:02:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2023-12-20 11:02:56,649 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 30 [2023-12-20 11:02:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:56,649 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2023-12-20 11:02:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2023-12-20 11:02:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 11:02:56,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:56,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 11:02:56,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:56,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:56,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:56,859 INFO L85 PathProgramCache]: Analyzing trace with hash -25271043, now seen corresponding path program 1 times [2023-12-20 11:02:56,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503207619] [2023-12-20 11:02:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:56,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 11:02:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503207619] [2023-12-20 11:02:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503207619] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 11:02:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451670849] [2023-12-20 11:02:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:56,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 11:02:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 11:02:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:02:56,956 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:57,153 INFO L93 Difference]: Finished difference Result 527 states and 687 transitions. [2023-12-20 11:02:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 11:02:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-20 11:02:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:57,155 INFO L225 Difference]: With dead ends: 527 [2023-12-20 11:02:57,155 INFO L226 Difference]: Without dead ends: 412 [2023-12-20 11:02:57,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:57,155 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 176 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:57,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 281 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 11:02:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-12-20 11:02:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 144. [2023-12-20 11:02:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3286713286713288) internal successors, (190), 143 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) [2023-12-20 11:02:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2023-12-20 11:02:57,162 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 36 [2023-12-20 11:02:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:57,162 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2023-12-20 11:02:57,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2023-12-20 11:02:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 11:02:57,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:57,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:57,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-20 11:02:57,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:57,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 503964974, now seen corresponding path program 1 times [2023-12-20 11:02:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:57,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012860034] [2023-12-20 11:02:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 11:02:57,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012860034] [2023-12-20 11:02:57,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012860034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:57,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:57,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 11:02:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159064650] [2023-12-20 11:02:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 11:02:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 11:02:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 11:02:57,265 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:57,478 INFO L93 Difference]: Finished difference Result 507 states and 662 transitions. [2023-12-20 11:02:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 11:02:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 37 [2023-12-20 11:02:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:57,480 INFO L225 Difference]: With dead ends: 507 [2023-12-20 11:02:57,480 INFO L226 Difference]: Without dead ends: 393 [2023-12-20 11:02:57,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:57,481 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 165 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:57,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 246 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 11:02:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-20 11:02:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 144. [2023-12-20 11:02:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3286713286713288) internal successors, (190), 143 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) [2023-12-20 11:02:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2023-12-20 11:02:57,488 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 37 [2023-12-20 11:02:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:57,488 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2023-12-20 11:02:57,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2023-12-20 11:02:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 11:02:57,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:57,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 11:02:57,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:57,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1565502776, now seen corresponding path program 1 times [2023-12-20 11:02:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574270320] [2023-12-20 11:02:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 11:02:57,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574270320] [2023-12-20 11:02:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574270320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:57,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:57,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 11:02:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822198448] [2023-12-20 11:02:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 11:02:57,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 11:02:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:57,561 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:57,857 INFO L93 Difference]: Finished difference Result 637 states and 829 transitions. [2023-12-20 11:02:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 11:02:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 11:02:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:57,859 INFO L225 Difference]: With dead ends: 637 [2023-12-20 11:02:57,859 INFO L226 Difference]: Without dead ends: 523 [2023-12-20 11:02:57,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-20 11:02:57,860 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 248 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:57,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 417 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 11:02:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-12-20 11:02:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 144. [2023-12-20 11:02:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3286713286713288) internal successors, (190), 143 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) [2023-12-20 11:02:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2023-12-20 11:02:57,867 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 38 [2023-12-20 11:02:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:57,868 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2023-12-20 11:02:57,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2023-12-20 11:02:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 11:02:57,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:57,868 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 11:02:57,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:57,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:57,869 INFO L85 PathProgramCache]: Analyzing trace with hash 863902902, now seen corresponding path program 1 times [2023-12-20 11:02:57,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:57,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162996508] [2023-12-20 11:02:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-20 11:02:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162996508] [2023-12-20 11:02:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162996508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 11:02:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89484232] [2023-12-20 11:02:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 11:02:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 11:02:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:57,959 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:58,350 INFO L93 Difference]: Finished difference Result 678 states and 880 transitions. [2023-12-20 11:02:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 11:02:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 11:02:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:58,353 INFO L225 Difference]: With dead ends: 678 [2023-12-20 11:02:58,353 INFO L226 Difference]: Without dead ends: 563 [2023-12-20 11:02:58,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-20 11:02:58,353 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 355 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:58,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 591 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 11:02:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-12-20 11:02:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 132. [2023-12-20 11:02:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3129770992366412) internal successors, (172), 131 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-12-20 11:02:58,365 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 38 [2023-12-20 11:02:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:58,365 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-12-20 11:02:58,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-12-20 11:02:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 11:02:58,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:58,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 11:02:58,366 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:58,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash -68020551, now seen corresponding path program 1 times [2023-12-20 11:02:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:58,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810825855] [2023-12-20 11:02:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:58,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 11:02:58,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810825855] [2023-12-20 11:02:58,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810825855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:58,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:58,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 11:02:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829795497] [2023-12-20 11:02:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:58,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 11:02:58,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:58,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 11:02:58,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 11:02:58,409 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:58,426 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2023-12-20 11:02:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 11:02:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-20 11:02:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:58,427 INFO L225 Difference]: With dead ends: 191 [2023-12-20 11:02:58,427 INFO L226 Difference]: Without dead ends: 160 [2023-12-20 11:02:58,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 11:02:58,428 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 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 [2023-12-20 11:02:58,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 11:02:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-20 11:02:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-12-20 11:02:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2023-12-20 11:02:58,440 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 43 [2023-12-20 11:02:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:58,440 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2023-12-20 11:02:58,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2023-12-20 11:02:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 11:02:58,440 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:58,441 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 11:02:58,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:58,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1318182843, now seen corresponding path program 1 times [2023-12-20 11:02:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825446249] [2023-12-20 11:02:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:02:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825446249] [2023-12-20 11:02:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825446249] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:02:58,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635574295] [2023-12-20 11:02:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:58,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:02:58,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 11:02:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:58,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 11:02:58,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:02:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 11:02:58,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:02:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635574295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:58,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:02:58,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 11:02:58,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527156209] [2023-12-20 11:02:58,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:58,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:02:58,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:58,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:02:58,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:02:58,606 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:58,693 INFO L93 Difference]: Finished difference Result 479 states and 619 transitions. [2023-12-20 11:02:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 11:02:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-20 11:02:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:58,694 INFO L225 Difference]: With dead ends: 479 [2023-12-20 11:02:58,694 INFO L226 Difference]: Without dead ends: 303 [2023-12-20 11:02:58,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:58,695 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:58,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:02:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-12-20 11:02:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 282. [2023-12-20 11:02:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2775800711743772) internal successors, (359), 281 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 359 transitions. [2023-12-20 11:02:58,708 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 359 transitions. Word has length 43 [2023-12-20 11:02:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:58,708 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 359 transitions. [2023-12-20 11:02:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 359 transitions. [2023-12-20 11:02:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 11:02:58,709 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:58,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:58,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 11:02:58,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:58,914 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:58,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1208906059, now seen corresponding path program 1 times [2023-12-20 11:02:58,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:58,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896407621] [2023-12-20 11:02:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:58,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:02:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896407621] [2023-12-20 11:02:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896407621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:02:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582581470] [2023-12-20 11:02:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:58,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:02:58,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:02:59,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:02:59,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 11:02:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:59,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 11:02:59,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:02:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 11:02:59,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:02:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582581470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:02:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-20 11:02:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730626931] [2023-12-20 11:02:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:59,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 11:02:59,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 11:02:59,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-20 11:02:59,143 INFO L87 Difference]: Start difference. First operand 282 states and 359 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:02:59,342 INFO L93 Difference]: Finished difference Result 782 states and 1022 transitions. [2023-12-20 11:02:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 11:02:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 11:02:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:02:59,344 INFO L225 Difference]: With dead ends: 782 [2023-12-20 11:02:59,344 INFO L226 Difference]: Without dead ends: 510 [2023-12-20 11:02:59,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-12-20 11:02:59,345 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 112 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 11:02:59,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 249 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 11:02:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-12-20 11:02:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 435. [2023-12-20 11:02:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.2788018433179724) internal successors, (555), 434 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 555 transitions. [2023-12-20 11:02:59,386 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 555 transitions. Word has length 44 [2023-12-20 11:02:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:02:59,387 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 555 transitions. [2023-12-20 11:02:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:02:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 555 transitions. [2023-12-20 11:02:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-20 11:02:59,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:02:59,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:02:59,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 11:02:59,592 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,SelfDestructingSolverStorable13 [2023-12-20 11:02:59,593 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:02:59,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:02:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1256829466, now seen corresponding path program 1 times [2023-12-20 11:02:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:02:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718254060] [2023-12-20 11:02:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:02:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:02:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:02:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 11:02:59,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:02:59,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718254060] [2023-12-20 11:02:59,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718254060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:02:59,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 11:02:59,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 11:02:59,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308674755] [2023-12-20 11:02:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:02:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 11:02:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:02:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 11:02:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:02:59,703 INFO L87 Difference]: Start difference. First operand 435 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:03:00,112 INFO L93 Difference]: Finished difference Result 2158 states and 2728 transitions. [2023-12-20 11:03:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 11:03:00,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-20 11:03:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:03:00,117 INFO L225 Difference]: With dead ends: 2158 [2023-12-20 11:03:00,117 INFO L226 Difference]: Without dead ends: 1775 [2023-12-20 11:03:00,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-20 11:03:00,118 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 299 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 11:03:00,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 504 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 11:03:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2023-12-20 11:03:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 423. [2023-12-20 11:03:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.2867298578199051) internal successors, (543), 422 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 543 transitions. [2023-12-20 11:03:00,142 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 543 transitions. Word has length 45 [2023-12-20 11:03:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:03:00,143 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 543 transitions. [2023-12-20 11:03:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 543 transitions. [2023-12-20 11:03:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 11:03:00,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:03:00,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:03:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 11:03:00,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:03:00,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:03:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -959300569, now seen corresponding path program 1 times [2023-12-20 11:03:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:03:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154946070] [2023-12-20 11:03:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:03:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:03:00,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:03:00,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154946070] [2023-12-20 11:03:00,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154946070] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:03:00,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410893511] [2023-12-20 11:03:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:03:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:03:00,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:03:00,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 11:03:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:00,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 11:03:00,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:03:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 11:03:00,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:03:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410893511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:03:00,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:03:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-12-20 11:03:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428398203] [2023-12-20 11:03:00,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:03:00,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 11:03:00,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:03:00,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 11:03:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-20 11:03:00,313 INFO L87 Difference]: Start difference. First operand 423 states and 543 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2023-12-20 11:03:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:03:00,414 INFO L93 Difference]: Finished difference Result 1310 states and 1686 transitions. [2023-12-20 11:03:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 11:03:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 47 [2023-12-20 11:03:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:03:00,416 INFO L225 Difference]: With dead ends: 1310 [2023-12-20 11:03:00,417 INFO L226 Difference]: Without dead ends: 861 [2023-12-20 11:03:00,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-20 11:03:00,417 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:03:00,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:03:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2023-12-20 11:03:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 776. [2023-12-20 11:03:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.270967741935484) internal successors, (985), 775 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 985 transitions. [2023-12-20 11:03:00,451 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 985 transitions. Word has length 47 [2023-12-20 11:03:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:03:00,451 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 985 transitions. [2023-12-20 11:03:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2023-12-20 11:03:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 985 transitions. [2023-12-20 11:03:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 11:03:00,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:03:00,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:03:00,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-20 11:03:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 11:03:00,657 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:03:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:03:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1777222138, now seen corresponding path program 1 times [2023-12-20 11:03:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:03:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659048927] [2023-12-20 11:03:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:00,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:03:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:03:00,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:03:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659048927] [2023-12-20 11:03:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659048927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:03:00,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406911911] [2023-12-20 11:03:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:00,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:03:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:03:00,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:03:00,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 11:03:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:00,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 11:03:00,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:03:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 11:03:00,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 11:03:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406911911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 11:03:00,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 11:03:00,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2023-12-20 11:03:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366903326] [2023-12-20 11:03:00,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:03:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 11:03:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:03:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 11:03:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-20 11:03:00,900 INFO L87 Difference]: Start difference. First operand 776 states and 985 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:03:01,091 INFO L93 Difference]: Finished difference Result 1755 states and 2248 transitions. [2023-12-20 11:03:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 11:03:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-20 11:03:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:03:01,095 INFO L225 Difference]: With dead ends: 1755 [2023-12-20 11:03:01,095 INFO L226 Difference]: Without dead ends: 1329 [2023-12-20 11:03:01,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-12-20 11:03:01,096 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 91 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 11:03:01,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 235 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 11:03:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2023-12-20 11:03:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1114. [2023-12-20 11:03:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 1.266846361185984) internal successors, (1410), 1113 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1410 transitions. [2023-12-20 11:03:01,164 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1410 transitions. Word has length 48 [2023-12-20 11:03:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:03:01,165 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1410 transitions. [2023-12-20 11:03:01,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1410 transitions. [2023-12-20 11:03:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 11:03:01,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:03:01,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:03:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 11:03:01,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:03:01,371 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:03:01,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:03:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1940647856, now seen corresponding path program 1 times [2023-12-20 11:03:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:03:01,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464801707] [2023-12-20 11:03:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:01,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:03:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:03:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 11:03:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464801707] [2023-12-20 11:03:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464801707] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 11:03:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107073149] [2023-12-20 11:03:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:01,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 11:03:01,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 11:03:01,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 11:03:01,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 11:03:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 11:03:01,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 11:03:01,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 11:03:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:03:01,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 11:03:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 11:03:01,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107073149] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 11:03:01,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 11:03:01,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 11] total 21 [2023-12-20 11:03:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194289216] [2023-12-20 11:03:01,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 11:03:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 11:03:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 11:03:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 11:03:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-12-20 11:03:01,901 INFO L87 Difference]: Start difference. First operand 1114 states and 1410 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2023-12-20 11:03:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 11:03:02,595 INFO L93 Difference]: Finished difference Result 2988 states and 3844 transitions. [2023-12-20 11:03:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 11:03:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 49 [2023-12-20 11:03:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 11:03:02,601 INFO L225 Difference]: With dead ends: 2988 [2023-12-20 11:03:02,601 INFO L226 Difference]: Without dead ends: 2563 [2023-12-20 11:03:02,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2023-12-20 11:03:02,603 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 400 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 11:03:02,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 201 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 11:03:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2023-12-20 11:03:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1763. [2023-12-20 11:03:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.2792281498297389) internal successors, (2254), 1762 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 11:03:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2254 transitions. [2023-12-20 11:03:02,694 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2254 transitions. Word has length 49 [2023-12-20 11:03:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 11:03:02,694 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 2254 transitions. [2023-12-20 11:03:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2023-12-20 11:03:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2254 transitions. [2023-12-20 11:03:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 11:03:02,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 11:03:02,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 11:03:02,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 11:03:02,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 11:03:02,901 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 11:03:02,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 11:03:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1692501362, now seen corresponding path program 1 times [2023-12-20 11:03:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 11:03:02,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823656530] [2023-12-20 11:03:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 11:03:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 11:03:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-20 11:03:02,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-20 11:03:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-20 11:03:02,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-20 11:03:02,930 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-20 11:03:02,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 11:03:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 11:03:02,934 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] [2023-12-20 11:03:02,936 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 11:03:02,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 11:03:02 BoogieIcfgContainer [2023-12-20 11:03:02,984 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 11:03:02,985 INFO L158 Benchmark]: Toolchain (without parser) took 9648.46ms. Allocated memory was 265.3MB in the beginning and 328.2MB in the end (delta: 62.9MB). Free memory was 213.1MB in the beginning and 134.1MB in the end (delta: 79.1MB). Peak memory consumption was 143.5MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,985 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 11:03:02,985 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.06ms. Allocated memory is still 265.3MB. Free memory was 213.1MB in the beginning and 200.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,985 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.48ms. Allocated memory is still 265.3MB. Free memory was 199.5MB in the beginning and 197.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,986 INFO L158 Benchmark]: Boogie Preprocessor took 29.69ms. Allocated memory is still 265.3MB. Free memory was 197.4MB in the beginning and 194.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,986 INFO L158 Benchmark]: RCFGBuilder took 411.80ms. Allocated memory is still 265.3MB. Free memory was 194.3MB in the beginning and 175.9MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,987 INFO L158 Benchmark]: TraceAbstraction took 8921.67ms. Allocated memory was 265.3MB in the beginning and 328.2MB in the end (delta: 62.9MB). Free memory was 175.3MB in the beginning and 134.1MB in the end (delta: 41.2MB). Peak memory consumption was 105.7MB. Max. memory is 8.0GB. [2023-12-20 11:03:02,992 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.06ms. Allocated memory is still 265.3MB. Free memory was 213.1MB in the beginning and 200.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.48ms. Allocated memory is still 265.3MB. Free memory was 199.5MB in the beginning and 197.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.69ms. Allocated memory is still 265.3MB. Free memory was 197.4MB in the beginning and 194.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 411.80ms. Allocated memory is still 265.3MB. Free memory was 194.3MB in the beginning and 175.9MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 8921.67ms. Allocated memory was 265.3MB in the beginning and 328.2MB in the end (delta: 62.9MB). Free memory was 175.3MB in the beginning and 134.1MB in the end (delta: 41.2MB). Peak memory consumption was 105.7MB. 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 - UnprovableResult [Line: 25]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwise operation at line 116. Possible FailurePath: [L124] unsigned int a, b, r; [L125] a = __VERIFIER_nondet_uint() [L127] b = 234770789 [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=234770789, a0=0, a=0, b0=234770789, b=234770789, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a3=0, a=0, b0=234770789, b=234770789, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a2=0, a3=0, a=0, b0=234770789, b=234770789, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b=234770789, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b=234770789, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b3=0, b=234770789, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b2=0, b3=0, b=234770789, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101, r0=101] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101, r0=101] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101, r0=101] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=0, na=1, nb=1, partial_sum=101, r0=101] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101] [L109] COND TRUE i == (unsigned char)1 [L109] r1 = (unsigned char)0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=1, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=2, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=3, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=4, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=234770789, a0=0, a1=0, a2=0, a3=0, a=0, b0=234770789, b1=0, b2=0, b3=0, b=234770789, carry=0, i=4, na=1, nb=1, partial_sum=101, r0=101, r1=0, r2=0, r3=0] [L116] EXPR r1 << 8U [L116] EXPR r0 | (r1 << 8U) [L116] EXPR r2 << 16U [L116] EXPR r0 | (r1 << 8U) | (r2 << 16U) [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 19, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2223 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2223 mSDsluCounter, 3757 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2339 mSDsCounter, 210 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3752 IncrementalHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 210 mSolverCounterUnsat, 1418 mSDtfsCounter, 3752 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 372 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1763occurred in iteration=18, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 4017 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 918 ConstructedInterpolants, 0 QuantifiedInterpolants, 3650 SizeOfPredicates, 15 NumberOfNonLiveVariables, 966 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 27 InterpolantComputations, 18 PerfectInterpolantSequences, 472/508 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: unable to determine feasibility of some traces [2023-12-20 11:03:03,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...