/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invgen/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:54:33,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:54:33,270 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 17:54:33,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:54:33,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:54:33,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:54:33,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:54:33,305 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:54:33,305 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:54:33,309 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:54:33,309 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:54:33,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:54:33,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:54:33,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:54:33,310 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:54:33,310 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:54:33,310 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:54:33,310 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:54:33,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:54:33,311 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:54:33,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:54:33,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:54:33,313 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:54:33,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:54:33,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:54:33,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:54:33,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:54:33,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:54:33,316 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:54:33,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:54:33,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:54:33,316 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:54:33,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:54:33,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:54:33,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:54:33,477 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:54:33,477 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:54:33,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2.i [2023-12-19 17:54:34,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:54:34,530 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:54:34,531 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i [2023-12-19 17:54:34,535 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81e079f1e/df268d943c8d4d63935f79322144819d/FLAG997fd1e87 [2023-12-19 17:54:34,546 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81e079f1e/df268d943c8d4d63935f79322144819d [2023-12-19 17:54:34,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:54:34,549 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:54:34,550 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:54:34,550 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:54:34,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:54:34,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360ee758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34, skipping insertion in model container [2023-12-19 17:54:34,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,584 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:54:34,682 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2023-12-19 17:54:34,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:54:34,694 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:54:34,702 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2023-12-19 17:54:34,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:54:34,712 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:54:34,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34 WrapperNode [2023-12-19 17:54:34,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:54:34,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:54:34,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:54:34,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:54:34,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,738 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2023-12-19 17:54:34,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:54:34,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:54:34,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:54:34,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:54:34,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,747 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,753 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]. [2023-12-19 17:54:34,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:54:34,759 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:54:34,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:54:34,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:54:34,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (1/1) ... [2023-12-19 17:54:34,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:54:34,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:34,779 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) [2023-12-19 17:54:34,781 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 [2023-12-19 17:54:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:54:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:54:34,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:54:34,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:54:34,843 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:54:34,844 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:54:34,921 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:54:34,936 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:54:34,937 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 17:54:34,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:54:34 BoogieIcfgContainer [2023-12-19 17:54:34,937 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:54:34,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:54:34,938 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:54:34,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:54:34,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:54:34" (1/3) ... [2023-12-19 17:54:34,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196b6f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:54:34, skipping insertion in model container [2023-12-19 17:54:34,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:54:34" (2/3) ... [2023-12-19 17:54:34,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196b6f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:54:34, skipping insertion in model container [2023-12-19 17:54:34,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:54:34" (3/3) ... [2023-12-19 17:54:34,942 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2023-12-19 17:54:34,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:54:34,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:54:34,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:54:34,989 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;@32ad7cf5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:54:34,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:54:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) [2023-12-19 17:54:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 17:54:34,996 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:34,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:34,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:34,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:35,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1610966213, now seen corresponding path program 1 times [2023-12-19 17:54:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933295613] [2023-12-19 17:54:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933295613] [2023-12-19 17:54:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933295613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:54:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:54:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 17:54:35,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888793467] [2023-12-19 17:54:35,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:54:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 17:54:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:35,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 17:54:35,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 17:54:35,106 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:35,128 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2023-12-19 17:54:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 17:54:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-19 17:54:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:35,134 INFO L225 Difference]: With dead ends: 21 [2023-12-19 17:54:35,134 INFO L226 Difference]: Without dead ends: 9 [2023-12-19 17:54:35,136 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 [2023-12-19 17:54:35,138 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:35,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:54:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-19 17:54:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-19 17:54:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2023-12-19 17:54:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-12-19 17:54:35,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-12-19 17:54:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:35,158 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-12-19 17:54:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-12-19 17:54:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 17:54:35,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:35,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:54:35,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:35,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1607272129, now seen corresponding path program 1 times [2023-12-19 17:54:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:35,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178642694] [2023-12-19 17:54:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:35,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178642694] [2023-12-19 17:54:35,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178642694] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:54:35,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:54:35,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 17:54:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158704391] [2023-12-19 17:54:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:54:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:54:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:54:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:54:35,316 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:35,347 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-12-19 17:54:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:54:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-12-19 17:54:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:35,348 INFO L225 Difference]: With dead ends: 16 [2023-12-19 17:54:35,348 INFO L226 Difference]: Without dead ends: 14 [2023-12-19 17:54:35,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:54:35,349 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:35,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:54:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-19 17:54:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-12-19 17:54:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-19 17:54:35,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-12-19 17:54:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:35,353 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-19 17:54:35,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-19 17:54:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-19 17:54:35,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:35,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:35,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 17:54:35,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:35,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1662725407, now seen corresponding path program 1 times [2023-12-19 17:54:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126606112] [2023-12-19 17:54:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126606112] [2023-12-19 17:54:35,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126606112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:35,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281842467] [2023-12-19 17:54:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:35,534 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) [2023-12-19 17:54:35,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 17:54:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:35,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 17:54:35,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:35,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:35,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281842467] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:35,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-19 17:54:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031639438] [2023-12-19 17:54:35,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 17:54:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 17:54:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-19 17:54:35,917 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2023-12-19 17:54:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:36,211 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-12-19 17:54:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 17:54:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 8 [2023-12-19 17:54:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:36,220 INFO L225 Difference]: With dead ends: 39 [2023-12-19 17:54:36,220 INFO L226 Difference]: Without dead ends: 37 [2023-12-19 17:54:36,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-12-19 17:54:36,225 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:36,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 30 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:54:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-19 17:54:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2023-12-19 17:54:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2023-12-19 17:54:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-19 17:54:36,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2023-12-19 17:54:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:36,243 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-19 17:54:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2023-12-19 17:54:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-19 17:54:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 17:54:36,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:36,244 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:36,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 17:54:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:36,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:36,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1494994657, now seen corresponding path program 2 times [2023-12-19 17:54:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264063301] [2023-12-19 17:54:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:36,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:36,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264063301] [2023-12-19 17:54:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264063301] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14807717] [2023-12-19 17:54:36,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:54:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:36,541 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) [2023-12-19 17:54:36,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 17:54:36,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:54:36,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:36,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 17:54:36,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:36,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:36,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14807717] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:36,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:36,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-12-19 17:54:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686672793] [2023-12-19 17:54:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 17:54:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 17:54:36,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-12-19 17:54:36,716 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2023-12-19 17:54:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:36,928 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-12-19 17:54:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 17:54:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 10 [2023-12-19 17:54:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:36,929 INFO L225 Difference]: With dead ends: 49 [2023-12-19 17:54:36,929 INFO L226 Difference]: Without dead ends: 47 [2023-12-19 17:54:36,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2023-12-19 17:54:36,930 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:36,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 72 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:54:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-19 17:54:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 18. [2023-12-19 17:54:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2023-12-19 17:54:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-19 17:54:36,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2023-12-19 17:54:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:36,934 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-19 17:54:36,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2023-12-19 17:54:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-19 17:54:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 17:54:36,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:36,934 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:36,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 17:54:37,139 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,SelfDestructingSolverStorable3 [2023-12-19 17:54:37,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:37,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1953404477, now seen corresponding path program 1 times [2023-12-19 17:54:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990548493] [2023-12-19 17:54:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990548493] [2023-12-19 17:54:37,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990548493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:37,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716232273] [2023-12-19 17:54:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:37,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:37,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:37,210 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) [2023-12-19 17:54:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:37,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 17:54:37,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:37,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 17:54:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:37,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 17:54:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716232273] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:54:37,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 17:54:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-19 17:54:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112591162] [2023-12-19 17:54:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:54:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:54:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:54:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-19 17:54:37,273 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-12-19 17:54:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:37,304 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-12-19 17:54:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:54:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2023-12-19 17:54:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:37,305 INFO L225 Difference]: With dead ends: 26 [2023-12-19 17:54:37,305 INFO L226 Difference]: Without dead ends: 18 [2023-12-19 17:54:37,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-19 17:54:37,306 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:37,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:54:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-19 17:54:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-19 17:54:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-19 17:54:37,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2023-12-19 17:54:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:37,315 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-19 17:54:37,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-12-19 17:54:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-19 17:54:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 17:54:37,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:37,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:37,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:37,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:37,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -19492291, now seen corresponding path program 1 times [2023-12-19 17:54:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114860082] [2023-12-19 17:54:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:37,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:37,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114860082] [2023-12-19 17:54:37,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114860082] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:37,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606369369] [2023-12-19 17:54:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:37,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:37,694 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) [2023-12-19 17:54:37,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 17:54:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:37,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 17:54:37,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:37,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:37,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606369369] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:37,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:37,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-12-19 17:54:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239864087] [2023-12-19 17:54:37,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:37,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 17:54:37,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 17:54:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-19 17:54:37,967 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:38,343 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-12-19 17:54:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-19 17:54:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-19 17:54:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:38,343 INFO L225 Difference]: With dead ends: 45 [2023-12-19 17:54:38,343 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 17:54:38,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 17:54:38,344 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:38,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:54:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 17:54:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2023-12-19 17:54:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2023-12-19 17:54:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-19 17:54:38,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2023-12-19 17:54:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:38,348 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-19 17:54:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-19 17:54:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-19 17:54:38,348 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:38,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:38,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:38,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:38,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:38,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash 323433825, now seen corresponding path program 2 times [2023-12-19 17:54:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:38,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106679136] [2023-12-19 17:54:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106679136] [2023-12-19 17:54:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106679136] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253293893] [2023-12-19 17:54:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:54:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:38,741 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) [2023-12-19 17:54:38,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 17:54:38,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:54:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:38,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 17:54:38,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:38,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253293893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:39,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:39,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-12-19 17:54:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180838834] [2023-12-19 17:54:39,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:39,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 17:54:39,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 17:54:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-12-19 17:54:39,110 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2023-12-19 17:54:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:39,583 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-12-19 17:54:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-19 17:54:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 16 [2023-12-19 17:54:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:39,584 INFO L225 Difference]: With dead ends: 47 [2023-12-19 17:54:39,584 INFO L226 Difference]: Without dead ends: 32 [2023-12-19 17:54:39,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 17:54:39,585 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:39,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:54:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-19 17:54:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-19 17:54:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-19 17:54:39,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2023-12-19 17:54:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:39,590 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-19 17:54:39,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2023-12-19 17:54:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-19 17:54:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-19 17:54:39,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:39,591 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:39,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:39,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:39,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:39,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash 661532001, now seen corresponding path program 3 times [2023-12-19 17:54:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:39,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102182680] [2023-12-19 17:54:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:39,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102182680] [2023-12-19 17:54:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102182680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797675503] [2023-12-19 17:54:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:54:39,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:39,924 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) [2023-12-19 17:54:39,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 17:54:39,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 17:54:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:39,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-19 17:54:39,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:40,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:40,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797675503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:40,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 34 [2023-12-19 17:54:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384732097] [2023-12-19 17:54:40,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:40,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 17:54:40,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 17:54:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 17:54:40,289 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:40,821 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-12-19 17:54:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-19 17:54:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-19 17:54:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:40,822 INFO L225 Difference]: With dead ends: 80 [2023-12-19 17:54:40,822 INFO L226 Difference]: Without dead ends: 78 [2023-12-19 17:54:40,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2023-12-19 17:54:40,824 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 145 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:40,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 89 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:54:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-19 17:54:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2023-12-19 17:54:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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) [2023-12-19 17:54:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-19 17:54:40,831 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2023-12-19 17:54:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:40,831 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-19 17:54:40,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-19 17:54:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-19 17:54:40,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:40,832 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:40,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:41,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:41,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:41,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:41,037 INFO L85 PathProgramCache]: Analyzing trace with hash -133365827, now seen corresponding path program 4 times [2023-12-19 17:54:41,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:41,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676150530] [2023-12-19 17:54:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:41,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:41,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676150530] [2023-12-19 17:54:41,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676150530] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:41,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281088437] [2023-12-19 17:54:41,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:54:41,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:41,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:41,252 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) [2023-12-19 17:54:41,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:54:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:41,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 17:54:41,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-19 17:54:41,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:41,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281088437] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:41,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:41,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 31 [2023-12-19 17:54:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606842119] [2023-12-19 17:54:41,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-19 17:54:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-19 17:54:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2023-12-19 17:54:41,787 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:42,488 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2023-12-19 17:54:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-19 17:54:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-19 17:54:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:42,488 INFO L225 Difference]: With dead ends: 92 [2023-12-19 17:54:42,489 INFO L226 Difference]: Without dead ends: 74 [2023-12-19 17:54:42,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 17:54:42,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:42,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:54:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-19 17:54:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 35. [2023-12-19 17:54:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-12-19 17:54:42,497 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2023-12-19 17:54:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-12-19 17:54:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-12-19 17:54:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-19 17:54:42,498 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:42,498 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:42,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:42,703 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:42,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1841711135, now seen corresponding path program 5 times [2023-12-19 17:54:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:42,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34863381] [2023-12-19 17:54:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34863381] [2023-12-19 17:54:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34863381] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822134563] [2023-12-19 17:54:42,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:54:42,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:42,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:42,962 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) [2023-12-19 17:54:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 17:54:42,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-19 17:54:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:42,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-19 17:54:42,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:43,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822134563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:43,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:43,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2023-12-19 17:54:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908686251] [2023-12-19 17:54:43,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:43,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 17:54:43,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 17:54:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 17:54:43,609 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 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) [2023-12-19 17:54:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:44,560 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-12-19 17:54:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-19 17:54:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-19 17:54:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:44,573 INFO L225 Difference]: With dead ends: 90 [2023-12-19 17:54:44,573 INFO L226 Difference]: Without dead ends: 69 [2023-12-19 17:54:44,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2023-12-19 17:54:44,574 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 93 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:44,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 59 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:54:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-19 17:54:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2023-12-19 17:54:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2023-12-19 17:54:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-12-19 17:54:44,587 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2023-12-19 17:54:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:44,587 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-12-19 17:54:44,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 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) [2023-12-19 17:54:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-12-19 17:54:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-19 17:54:44,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:44,588 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:44,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:44,793 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,SelfDestructingSolverStorable9 [2023-12-19 17:54:44,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:44,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1386263235, now seen corresponding path program 6 times [2023-12-19 17:54:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999759301] [2023-12-19 17:54:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:45,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999759301] [2023-12-19 17:54:45,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999759301] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:45,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297940280] [2023-12-19 17:54:45,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:54:45,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:45,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:54:45,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 17:54:45,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-19 17:54:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:45,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 17:54:45,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:45,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297940280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:46,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2023-12-19 17:54:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414858546] [2023-12-19 17:54:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:46,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-19 17:54:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-19 17:54:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1949, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 17:54:46,123 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:46,859 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-19 17:54:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-19 17:54:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-19 17:54:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:46,860 INFO L225 Difference]: With dead ends: 59 [2023-12-19 17:54:46,860 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 17:54:46,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=4069, Unknown=0, NotChecked=0, Total=4692 [2023-12-19 17:54:46,861 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:46,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:54:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 17:54:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-12-19 17:54:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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) [2023-12-19 17:54:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-12-19 17:54:46,869 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-12-19 17:54:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:46,869 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-12-19 17:54:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-12-19 17:54:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 17:54:46,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:46,870 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:46,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:47,074 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:47,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1323017631, now seen corresponding path program 7 times [2023-12-19 17:54:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:47,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261644405] [2023-12-19 17:54:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:47,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:47,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:47,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261644405] [2023-12-19 17:54:47,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261644405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:47,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497945412] [2023-12-19 17:54:47,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:54:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:47,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:54:47,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 17:54:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:47,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-19 17:54:47,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:47,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:48,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497945412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:48,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:48,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2023-12-19 17:54:48,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006565204] [2023-12-19 17:54:48,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:48,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-19 17:54:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-19 17:54:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 17:54:48,344 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:49,740 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-12-19 17:54:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-19 17:54:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-19 17:54:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:49,741 INFO L225 Difference]: With dead ends: 91 [2023-12-19 17:54:49,741 INFO L226 Difference]: Without dead ends: 64 [2023-12-19 17:54:49,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=882, Invalid=4818, Unknown=0, NotChecked=0, Total=5700 [2023-12-19 17:54:49,742 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 125 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:49,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 87 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:54:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-19 17:54:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-12-19 17:54:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-19 17:54:49,756 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2023-12-19 17:54:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:49,756 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-19 17:54:49,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-19 17:54:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 17:54:49,756 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:49,757 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:49,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:49,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 17:54:49,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:49,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1315273405, now seen corresponding path program 8 times [2023-12-19 17:54:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578062159] [2023-12-19 17:54:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:50,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578062159] [2023-12-19 17:54:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578062159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387827673] [2023-12-19 17:54:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:54:50,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:50,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:50,423 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:54:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 17:54:50,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:54:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:50,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 17:54:50,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:50,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387827673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:51,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:51,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2023-12-19 17:54:51,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783155781] [2023-12-19 17:54:51,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:51,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-19 17:54:51,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-19 17:54:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 17:54:51,434 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:53,281 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2023-12-19 17:54:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-19 17:54:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2023-12-19 17:54:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:53,282 INFO L225 Difference]: With dead ends: 122 [2023-12-19 17:54:53,282 INFO L226 Difference]: Without dead ends: 92 [2023-12-19 17:54:53,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1083, Invalid=6057, Unknown=0, NotChecked=0, Total=7140 [2023-12-19 17:54:53,284 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 149 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:53,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 124 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 17:54:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-19 17:54:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2023-12-19 17:54:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-19 17:54:53,305 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 36 [2023-12-19 17:54:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:53,305 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-19 17:54:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-19 17:54:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 17:54:53,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:53,306 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:53,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 17:54:53,507 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:53,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -78230943, now seen corresponding path program 9 times [2023-12-19 17:54:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989042663] [2023-12-19 17:54:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:53,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989042663] [2023-12-19 17:54:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989042663] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:53,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146810179] [2023-12-19 17:54:53,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:54:53,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:53,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:53,878 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:54:53,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 17:54:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-19 17:54:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:53,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-19 17:54:53,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:54,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146810179] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:54,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 66 [2023-12-19 17:54:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677649749] [2023-12-19 17:54:54,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-19 17:54:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-19 17:54:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=3439, Unknown=0, NotChecked=0, Total=4290 [2023-12-19 17:54:54,785 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:54:56,551 INFO L93 Difference]: Finished difference Result 264 states and 286 transitions. [2023-12-19 17:54:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-19 17:54:56,551 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-19 17:54:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:54:56,552 INFO L225 Difference]: With dead ends: 264 [2023-12-19 17:54:56,552 INFO L226 Difference]: Without dead ends: 262 [2023-12-19 17:54:56,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6404 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5083, Invalid=14939, Unknown=0, NotChecked=0, Total=20022 [2023-12-19 17:54:56,556 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 249 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 17:54:56,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 229 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 17:54:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-19 17:54:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 71. [2023-12-19 17:54:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-12-19 17:54:56,589 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 40 [2023-12-19 17:54:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:54:56,590 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-12-19 17:54:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:54:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-12-19 17:54:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 17:54:56,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:54:56,590 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-12-19 17:54:56,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 17:54:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-19 17:54:56,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:54:56,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:54:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash -647029535, now seen corresponding path program 10 times [2023-12-19 17:54:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:54:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662676411] [2023-12-19 17:54:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:54:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:54:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:54:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:57,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:54:57,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662676411] [2023-12-19 17:54:57,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662676411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:54:57,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409858796] [2023-12-19 17:54:57,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:54:57,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:54:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:54:57,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:54:57,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 17:54:57,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:54:57,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:54:57,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 17:54:57,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:54:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:57,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:54:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:54:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409858796] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:54:58,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:54:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 56 [2023-12-19 17:54:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806060947] [2023-12-19 17:54:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:54:58,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-19 17:54:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:54:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-19 17:54:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2023-12-19 17:54:58,591 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:00,840 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2023-12-19 17:55:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-19 17:55:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-19 17:55:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:00,844 INFO L225 Difference]: With dead ends: 270 [2023-12-19 17:55:00,844 INFO L226 Difference]: Without dead ends: 237 [2023-12-19 17:55:00,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1379, Invalid=7741, Unknown=0, NotChecked=0, Total=9120 [2023-12-19 17:55:00,846 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 172 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:00,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 131 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 17:55:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-12-19 17:55:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 70. [2023-12-19 17:55:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-12-19 17:55:00,882 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 40 [2023-12-19 17:55:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:00,882 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-12-19 17:55:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8928571428571428) internal successors, (106), 56 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-12-19 17:55:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-19 17:55:00,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:00,883 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:00,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 17:55:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 17:55:01,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:01,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash -122189763, now seen corresponding path program 11 times [2023-12-19 17:55:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571717099] [2023-12-19 17:55:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:01,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571717099] [2023-12-19 17:55:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571717099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582544032] [2023-12-19 17:55:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:55:01,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:01,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:01,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 17:55:01,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-19 17:55:01,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:01,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-19 17:55:01,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:02,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582544032] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:03,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 61 [2023-12-19 17:55:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100673850] [2023-12-19 17:55:03,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:03,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-19 17:55:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-19 17:55:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3099, Unknown=0, NotChecked=0, Total=3660 [2023-12-19 17:55:03,167 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:05,833 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2023-12-19 17:55:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-19 17:55:05,833 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2023-12-19 17:55:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:05,834 INFO L225 Difference]: With dead ends: 262 [2023-12-19 17:55:05,834 INFO L226 Difference]: Without dead ends: 226 [2023-12-19 17:55:05,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1628, Invalid=9292, Unknown=0, NotChecked=0, Total=10920 [2023-12-19 17:55:05,835 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 192 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:05,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 159 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 17:55:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-19 17:55:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 69. [2023-12-19 17:55:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-12-19 17:55:05,865 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 44 [2023-12-19 17:55:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:05,865 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-12-19 17:55:05,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:05,865 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-12-19 17:55:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-19 17:55:05,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:05,865 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:05,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 17:55:06,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:06,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:06,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -964559007, now seen corresponding path program 12 times [2023-12-19 17:55:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:06,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599766170] [2023-12-19 17:55:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599766170] [2023-12-19 17:55:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599766170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601738862] [2023-12-19 17:55:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:55:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:06,694 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:06,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 17:55:06,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-19 17:55:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:06,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 17:55:06,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:07,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:08,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601738862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:08,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:08,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 78 [2023-12-19 17:55:08,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251160021] [2023-12-19 17:55:08,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:08,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-19 17:55:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-19 17:55:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5264, Unknown=0, NotChecked=0, Total=6006 [2023-12-19 17:55:08,822 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:10,796 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2023-12-19 17:55:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-19 17:55:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-19 17:55:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:10,797 INFO L225 Difference]: With dead ends: 116 [2023-12-19 17:55:10,797 INFO L226 Difference]: Without dead ends: 77 [2023-12-19 17:55:10,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1547, Invalid=11335, Unknown=0, NotChecked=0, Total=12882 [2023-12-19 17:55:10,801 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:10,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 58 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:55:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-19 17:55:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-12-19 17:55:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-12-19 17:55:10,830 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 48 [2023-12-19 17:55:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:10,830 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-12-19 17:55:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.7820512820512822) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-12-19 17:55:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-19 17:55:10,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:10,831 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:10,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 17:55:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 17:55:11,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:11,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash 938309053, now seen corresponding path program 13 times [2023-12-19 17:55:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186111807] [2023-12-19 17:55:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:11,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186111807] [2023-12-19 17:55:11,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186111807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287600303] [2023-12-19 17:55:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:55:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:11,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 17:55:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:11,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-19 17:55:11,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:12,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287600303] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:13,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:13,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2023-12-19 17:55:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065039837] [2023-12-19 17:55:13,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:13,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-19 17:55:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-19 17:55:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2023-12-19 17:55:13,569 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:17,134 INFO L93 Difference]: Finished difference Result 228 states and 243 transitions. [2023-12-19 17:55:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-12-19 17:55:17,134 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-19 17:55:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:17,135 INFO L225 Difference]: With dead ends: 228 [2023-12-19 17:55:17,135 INFO L226 Difference]: Without dead ends: 186 [2023-12-19 17:55:17,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2097, Invalid=12423, Unknown=0, NotChecked=0, Total=14520 [2023-12-19 17:55:17,136 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 237 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:17,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 205 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 17:55:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-19 17:55:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 67. [2023-12-19 17:55:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2023-12-19 17:55:17,167 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 52 [2023-12-19 17:55:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:17,168 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2023-12-19 17:55:17,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2023-12-19 17:55:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-19 17:55:17,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:17,168 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:17,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-19 17:55:17,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 17:55:17,372 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:17,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash 96797153, now seen corresponding path program 14 times [2023-12-19 17:55:17,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:17,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139039746] [2023-12-19 17:55:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:17,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:18,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:18,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139039746] [2023-12-19 17:55:18,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139039746] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:18,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264965992] [2023-12-19 17:55:18,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:55:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:18,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:18,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:18,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 17:55:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:55:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:18,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-19 17:55:18,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:19,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:20,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264965992] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:20,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:20,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2023-12-19 17:55:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913756012] [2023-12-19 17:55:20,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:20,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-19 17:55:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-19 17:55:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=6762, Unknown=0, NotChecked=0, Total=7832 [2023-12-19 17:55:20,729 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 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) [2023-12-19 17:55:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:25,320 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2023-12-19 17:55:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-19 17:55:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 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) Word has length 56 [2023-12-19 17:55:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:25,321 INFO L225 Difference]: With dead ends: 202 [2023-12-19 17:55:25,321 INFO L226 Difference]: Without dead ends: 157 [2023-12-19 17:55:25,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6558 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2974, Invalid=18488, Unknown=0, NotChecked=0, Total=21462 [2023-12-19 17:55:25,322 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 264 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:25,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 245 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 17:55:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-19 17:55:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 66. [2023-12-19 17:55:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-12-19 17:55:25,357 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 56 [2023-12-19 17:55:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:25,357 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-12-19 17:55:25,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8314606741573034) internal successors, (163), 89 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) [2023-12-19 17:55:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-12-19 17:55:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-19 17:55:25,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:25,358 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:25,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-19 17:55:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:25,559 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:25,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2053160131, now seen corresponding path program 15 times [2023-12-19 17:55:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:25,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485244710] [2023-12-19 17:55:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485244710] [2023-12-19 17:55:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485244710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883833543] [2023-12-19 17:55:26,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:55:26,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:26,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:26,463 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:26,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 17:55:26,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-19 17:55:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:26,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-19 17:55:26,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:27,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:29,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883833543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:29,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:29,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 96 [2023-12-19 17:55:29,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979216561] [2023-12-19 17:55:29,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:29,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-12-19 17:55:29,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-12-19 17:55:29,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=8021, Unknown=0, NotChecked=0, Total=9120 [2023-12-19 17:55:29,485 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:32,730 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2023-12-19 17:55:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-19 17:55:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-19 17:55:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:32,731 INFO L225 Difference]: With dead ends: 115 [2023-12-19 17:55:32,731 INFO L226 Difference]: Without dead ends: 67 [2023-12-19 17:55:32,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2318, Invalid=17422, Unknown=0, NotChecked=0, Total=19740 [2023-12-19 17:55:32,733 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:32,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 85 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 17:55:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-19 17:55:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-12-19 17:55:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-19 17:55:32,767 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2023-12-19 17:55:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:32,768 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-19 17:55:32,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.8229166666666667) internal successors, (175), 96 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-19 17:55:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-19 17:55:32,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:32,768 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:32,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-19 17:55:32,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:32,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:32,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1990206561, now seen corresponding path program 16 times [2023-12-19 17:55:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:32,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79275449] [2023-12-19 17:55:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:33,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79275449] [2023-12-19 17:55:33,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79275449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075410941] [2023-12-19 17:55:33,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:55:33,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:33,965 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:33,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 17:55:34,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:55:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:34,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-19 17:55:34,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:34,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:36,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075410941] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:36,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:36,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 86 [2023-12-19 17:55:36,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361016203] [2023-12-19 17:55:36,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:36,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-12-19 17:55:36,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-12-19 17:55:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6232, Unknown=0, NotChecked=0, Total=7310 [2023-12-19 17:55:36,601 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 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) [2023-12-19 17:55:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:41,899 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2023-12-19 17:55:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-12-19 17:55:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 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) Word has length 64 [2023-12-19 17:55:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:41,900 INFO L225 Difference]: With dead ends: 179 [2023-12-19 17:55:41,900 INFO L226 Difference]: Without dead ends: 128 [2023-12-19 17:55:41,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5868 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3188, Invalid=19162, Unknown=0, NotChecked=0, Total=22350 [2023-12-19 17:55:41,902 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 316 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:41,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 303 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 17:55:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-19 17:55:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2023-12-19 17:55:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2023-12-19 17:55:41,967 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 64 [2023-12-19 17:55:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:41,967 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2023-12-19 17:55:41,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 86 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) [2023-12-19 17:55:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2023-12-19 17:55:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-19 17:55:41,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:41,968 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:41,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 17:55:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:42,168 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:42,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash -916131651, now seen corresponding path program 17 times [2023-12-19 17:55:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:42,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648104857] [2023-12-19 17:55:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648104857] [2023-12-19 17:55:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648104857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547785203] [2023-12-19 17:55:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:55:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:43,270 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 17:55:43,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-12-19 17:55:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:43,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-19 17:55:43,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:44,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547785203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:46,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:46,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2023-12-19 17:55:46,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475434330] [2023-12-19 17:55:46,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:46,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-19 17:55:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:46,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-19 17:55:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=6984, Unknown=0, NotChecked=0, Total=8190 [2023-12-19 17:55:46,178 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:52,312 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2023-12-19 17:55:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-19 17:55:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-19 17:55:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:52,313 INFO L225 Difference]: With dead ends: 234 [2023-12-19 17:55:52,313 INFO L226 Difference]: Without dead ends: 180 [2023-12-19 17:55:52,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6741 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3618, Invalid=21822, Unknown=0, NotChecked=0, Total=25440 [2023-12-19 17:55:52,314 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 349 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:52,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 401 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-19 17:55:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-19 17:55:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2023-12-19 17:55:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 134 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2023-12-19 17:55:52,415 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 68 [2023-12-19 17:55:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:52,415 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2023-12-19 17:55:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2023-12-19 17:55:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-19 17:55:52,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:52,416 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:52,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-19 17:55:52,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-19 17:55:52,616 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:52,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash -897882399, now seen corresponding path program 18 times [2023-12-19 17:55:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266727439] [2023-12-19 17:55:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:52,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:53,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:53,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266727439] [2023-12-19 17:55:53,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266727439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:55:53,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019498258] [2023-12-19 17:55:53,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:55:53,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:55:53,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:53,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:55:53,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 17:55:53,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-19 17:55:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:55:53,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-19 17:55:53,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:55:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:55,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:55:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:58,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019498258] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:55:58,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:55:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 42] total 118 [2023-12-19 17:55:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162111632] [2023-12-19 17:55:58,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:55:58,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-12-19 17:55:58,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-12-19 17:55:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=12180, Unknown=0, NotChecked=0, Total=13806 [2023-12-19 17:55:58,182 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:03,197 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2023-12-19 17:56:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-19 17:56:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-19 17:56:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:03,198 INFO L225 Difference]: With dead ends: 196 [2023-12-19 17:56:03,198 INFO L226 Difference]: Without dead ends: 139 [2023-12-19 17:56:03,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7910 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3442, Invalid=26314, Unknown=0, NotChecked=0, Total=29756 [2023-12-19 17:56:03,199 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:03,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 76 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 17:56:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-19 17:56:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2023-12-19 17:56:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 134 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2023-12-19 17:56:03,301 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 72 [2023-12-19 17:56:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:03,301 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2023-12-19 17:56:03,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7881355932203389) internal successors, (211), 118 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2023-12-19 17:56:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-19 17:56:03,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:03,302 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:03,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:03,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-19 17:56:03,506 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:03,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1901191487, now seen corresponding path program 19 times [2023-12-19 17:56:03,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:03,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45231201] [2023-12-19 17:56:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:03,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:04,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45231201] [2023-12-19 17:56:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45231201] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79827475] [2023-12-19 17:56:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:56:04,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:04,132 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:04,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 17:56:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:04,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 17:56:04,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:04,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:05,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79827475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:05,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:05,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2023-12-19 17:56:05,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727074356] [2023-12-19 17:56:05,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:05,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-19 17:56:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:05,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-19 17:56:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2023-12-19 17:56:05,384 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:06,664 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2023-12-19 17:56:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-19 17:56:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-12-19 17:56:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:06,665 INFO L225 Difference]: With dead ends: 193 [2023-12-19 17:56:06,665 INFO L226 Difference]: Without dead ends: 191 [2023-12-19 17:56:06,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 92 SyntacticMatches, 17 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4945 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3056, Invalid=12694, Unknown=0, NotChecked=0, Total=15750 [2023-12-19 17:56:06,667 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 186 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:06,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 77 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:56:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-19 17:56:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 77. [2023-12-19 17:56:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-12-19 17:56:06,726 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2023-12-19 17:56:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:06,727 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-12-19 17:56:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-12-19 17:56:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-19 17:56:06,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:06,727 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:06,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:06,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:06,932 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:06,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -657031619, now seen corresponding path program 20 times [2023-12-19 17:56:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:06,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255849462] [2023-12-19 17:56:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:08,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255849462] [2023-12-19 17:56:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255849462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749629117] [2023-12-19 17:56:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:56:08,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:08,244 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:08,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 17:56:08,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:56:08,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:08,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-19 17:56:08,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:09,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:11,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749629117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:11,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:11,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 98 [2023-12-19 17:56:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682585178] [2023-12-19 17:56:11,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:11,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-12-19 17:56:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:11,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-12-19 17:56:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=8123, Unknown=0, NotChecked=0, Total=9506 [2023-12-19 17:56:11,494 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:19,211 INFO L93 Difference]: Finished difference Result 212 states and 234 transitions. [2023-12-19 17:56:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-12-19 17:56:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 0 states have call successors, (0), 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 76 [2023-12-19 17:56:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:19,212 INFO L225 Difference]: With dead ends: 212 [2023-12-19 17:56:19,212 INFO L226 Difference]: Without dead ends: 152 [2023-12-19 17:56:19,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7981 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4248, Invalid=26202, Unknown=0, NotChecked=0, Total=30450 [2023-12-19 17:56:19,213 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 400 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 3841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:19,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 406 Invalid, 3841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-19 17:56:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-19 17:56:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2023-12-19 17:56:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.202020202020202) internal successors, (119), 99 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-12-19 17:56:19,325 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 76 [2023-12-19 17:56:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:19,325 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-12-19 17:56:19,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 98 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-12-19 17:56:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-19 17:56:19,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:19,326 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:19,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 17:56:19,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:19,530 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:19,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash 79612257, now seen corresponding path program 21 times [2023-12-19 17:56:19,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912201465] [2023-12-19 17:56:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:20,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912201465] [2023-12-19 17:56:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912201465] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:20,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962163524] [2023-12-19 17:56:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:56:20,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:20,992 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:20,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 17:56:21,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-12-19 17:56:21,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:21,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-19 17:56:21,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:22,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962163524] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:25,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 44] total 124 [2023-12-19 17:56:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654796489] [2023-12-19 17:56:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-12-19 17:56:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-12-19 17:56:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2034, Invalid=13218, Unknown=0, NotChecked=0, Total=15252 [2023-12-19 17:56:25,703 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:33,947 INFO L93 Difference]: Finished difference Result 276 states and 299 transitions. [2023-12-19 17:56:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-12-19 17:56:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-12-19 17:56:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:33,957 INFO L225 Difference]: With dead ends: 276 [2023-12-19 17:56:33,957 INFO L226 Difference]: Without dead ends: 213 [2023-12-19 17:56:33,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12862 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=5587, Invalid=35825, Unknown=0, NotChecked=0, Total=41412 [2023-12-19 17:56:33,959 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 438 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:33,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 565 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 17:56:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-19 17:56:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 159. [2023-12-19 17:56:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.139240506329114) internal successors, (180), 158 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-12-19 17:56:34,137 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 80 [2023-12-19 17:56:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:34,137 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-12-19 17:56:34,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.8870967741935485) internal successors, (234), 124 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-12-19 17:56:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-19 17:56:34,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:34,138 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:34,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 17:56:34,343 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:34,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash -141825091, now seen corresponding path program 22 times [2023-12-19 17:56:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511231439] [2023-12-19 17:56:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:35,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511231439] [2023-12-19 17:56:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511231439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:35,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930394863] [2023-12-19 17:56:35,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:56:35,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:35,972 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:35,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 17:56:36,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:56:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:36,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-19 17:56:36,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:37,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930394863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:40,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 111 [2023-12-19 17:56:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855937556] [2023-12-19 17:56:40,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-12-19 17:56:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-12-19 17:56:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=10437, Unknown=0, NotChecked=0, Total=12210 [2023-12-19 17:56:40,125 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:56:49,847 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2023-12-19 17:56:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-12-19 17:56:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-12-19 17:56:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:56:49,850 INFO L225 Difference]: With dead ends: 343 [2023-12-19 17:56:49,850 INFO L226 Difference]: Without dead ends: 277 [2023-12-19 17:56:49,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5342, Invalid=32878, Unknown=0, NotChecked=0, Total=38220 [2023-12-19 17:56:49,851 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 476 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-19 17:56:49,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 658 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 4027 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-19 17:56:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-19 17:56:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 221. [2023-12-19 17:56:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1136363636363635) internal successors, (245), 220 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2023-12-19 17:56:50,092 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 84 [2023-12-19 17:56:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:56:50,092 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2023-12-19 17:56:50,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:56:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2023-12-19 17:56:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-19 17:56:50,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:56:50,093 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-12-19 17:56:50,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 17:56:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 17:56:50,293 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:56:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:56:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash -86881311, now seen corresponding path program 23 times [2023-12-19 17:56:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:56:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100704992] [2023-12-19 17:56:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:56:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:56:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:56:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:56:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100704992] [2023-12-19 17:56:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100704992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:56:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960976886] [2023-12-19 17:56:51,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:56:51,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:56:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:56:51,979 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:56:51,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 17:56:52,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-12-19 17:56:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:56:52,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-19 17:56:52,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:56:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:53,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:56:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:56:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960976886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:56:56,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:56:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 48] total 116 [2023-12-19 17:56:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592713010] [2023-12-19 17:56:56,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:56:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-12-19 17:56:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:56:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-12-19 17:56:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1938, Invalid=11402, Unknown=0, NotChecked=0, Total=13340 [2023-12-19 17:56:56,626 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:57:07,940 INFO L93 Difference]: Finished difference Result 413 states and 441 transitions. [2023-12-19 17:57:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-12-19 17:57:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 0 states have call successors, (0), 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 88 [2023-12-19 17:57:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:57:07,941 INFO L225 Difference]: With dead ends: 413 [2023-12-19 17:57:07,942 INFO L226 Difference]: Without dead ends: 344 [2023-12-19 17:57:07,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11662 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=6035, Invalid=37021, Unknown=0, NotChecked=0, Total=43056 [2023-12-19 17:57:07,944 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 508 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 4783 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 5304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:57:07,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 810 Invalid, 5304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4783 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-19 17:57:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-12-19 17:57:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 286. [2023-12-19 17:57:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 285 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 314 transitions. [2023-12-19 17:57:08,253 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 314 transitions. Word has length 88 [2023-12-19 17:57:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:57:08,253 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 314 transitions. [2023-12-19 17:57:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 116 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 314 transitions. [2023-12-19 17:57:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-19 17:57:08,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:57:08,254 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-12-19 17:57:08,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 17:57:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-19 17:57:08,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:57:08,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:57:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1461532989, now seen corresponding path program 24 times [2023-12-19 17:57:08,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:57:08,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280377386] [2023-12-19 17:57:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:57:08,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:57:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:57:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:10,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:57:10,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280377386] [2023-12-19 17:57:10,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280377386] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:57:10,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207405847] [2023-12-19 17:57:10,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:57:10,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:10,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:57:10,280 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:57:10,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 17:57:10,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-12-19 17:57:10,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:57:10,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-19 17:57:10,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:57:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:13,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:57:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207405847] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:57:17,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:57:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 52, 52] total 148 [2023-12-19 17:57:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447003480] [2023-12-19 17:57:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:57:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-12-19 17:57:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:57:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-12-19 17:57:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2518, Invalid=19238, Unknown=0, NotChecked=0, Total=21756 [2023-12-19 17:57:17,034 INFO L87 Difference]: Start difference. First operand 286 states and 314 transitions. Second operand has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:57:26,215 INFO L93 Difference]: Finished difference Result 362 states and 391 transitions. [2023-12-19 17:57:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-19 17:57:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-12-19 17:57:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:57:26,229 INFO L225 Difference]: With dead ends: 362 [2023-12-19 17:57:26,229 INFO L226 Difference]: Without dead ends: 290 [2023-12-19 17:57:26,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12409 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=5378, Invalid=41928, Unknown=0, NotChecked=0, Total=47306 [2023-12-19 17:57:26,231 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 134 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 3527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:57:26,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 122 Invalid, 3527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 3221 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 17:57:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-19 17:57:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2023-12-19 17:57:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.0982456140350878) internal successors, (313), 285 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 313 transitions. [2023-12-19 17:57:26,526 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 313 transitions. Word has length 92 [2023-12-19 17:57:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:57:26,526 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 313 transitions. [2023-12-19 17:57:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.8310810810810811) internal successors, (271), 148 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 313 transitions. [2023-12-19 17:57:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-19 17:57:26,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:57:26,527 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-12-19 17:57:26,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-19 17:57:26,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 17:57:26,727 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:57:26,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:57:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1805992221, now seen corresponding path program 25 times [2023-12-19 17:57:26,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:57:26,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873557889] [2023-12-19 17:57:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:57:26,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:57:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:57:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 231 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:57:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873557889] [2023-12-19 17:57:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873557889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:57:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521666705] [2023-12-19 17:57:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:57:27,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:57:27,702 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:57:27,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 17:57:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:57:27,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-19 17:57:27,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:57:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:28,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:57:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521666705] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:57:29,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:57:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-12-19 17:57:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537840994] [2023-12-19 17:57:29,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:57:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-19 17:57:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:57:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-19 17:57:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=7474, Unknown=0, NotChecked=0, Total=8930 [2023-12-19 17:57:29,642 INFO L87 Difference]: Start difference. First operand 286 states and 313 transitions. Second operand has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:57:31,803 INFO L93 Difference]: Finished difference Result 359 states and 390 transitions. [2023-12-19 17:57:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-12-19 17:57:31,803 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 0 states have call successors, (0), 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 93 [2023-12-19 17:57:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:57:31,804 INFO L225 Difference]: With dead ends: 359 [2023-12-19 17:57:31,804 INFO L226 Difference]: Without dead ends: 357 [2023-12-19 17:57:31,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 117 SyntacticMatches, 22 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8270 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4941, Invalid=20819, Unknown=0, NotChecked=0, Total=25760 [2023-12-19 17:57:31,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 342 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 17:57:31,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 96 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 17:57:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-12-19 17:57:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 97. [2023-12-19 17:57:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-12-19 17:57:31,930 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2023-12-19 17:57:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:57:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-12-19 17:57:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 95 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-12-19 17:57:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-19 17:57:31,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:57:31,931 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-12-19 17:57:31,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-19 17:57:32,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:32,132 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:57:32,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:57:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -736235935, now seen corresponding path program 26 times [2023-12-19 17:57:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:57:32,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781188133] [2023-12-19 17:57:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:57:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:57:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:57:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:57:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781188133] [2023-12-19 17:57:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781188133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:57:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512482068] [2023-12-19 17:57:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:57:34,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:57:34,135 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:57:34,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 17:57:34,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:57:34,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:57:34,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-19 17:57:34,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:57:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:35,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:57:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:39,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512482068] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:57:39,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:57:39,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 123 [2023-12-19 17:57:39,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742254401] [2023-12-19 17:57:39,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:57:39,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-12-19 17:57:39,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:57:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-12-19 17:57:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=12843, Unknown=0, NotChecked=0, Total=15006 [2023-12-19 17:57:39,083 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:57:51,825 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2023-12-19 17:57:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-12-19 17:57:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-12-19 17:57:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:57:51,826 INFO L225 Difference]: With dead ends: 267 [2023-12-19 17:57:51,826 INFO L226 Difference]: Without dead ends: 192 [2023-12-19 17:57:51,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12736 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=6618, Invalid=41562, Unknown=0, NotChecked=0, Total=48180 [2023-12-19 17:57:51,829 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 569 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 5194 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 5780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 5194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:57:51,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 617 Invalid, 5780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 5194 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-19 17:57:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-19 17:57:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2023-12-19 17:57:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2023-12-19 17:57:52,051 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 96 [2023-12-19 17:57:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:57:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2023-12-19 17:57:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:57:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2023-12-19 17:57:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-19 17:57:52,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:57:52,052 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-12-19 17:57:52,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 17:57:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:52,257 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:57:52,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:57:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1759353155, now seen corresponding path program 27 times [2023-12-19 17:57:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:57:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396278988] [2023-12-19 17:57:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:57:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:57:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:57:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:57:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396278988] [2023-12-19 17:57:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396278988] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:57:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734119473] [2023-12-19 17:57:54,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:57:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:57:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:57:54,377 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:57:54,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 17:57:54,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-19 17:57:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:57:54,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-19 17:57:54,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:57:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:57:57,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:58:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:01,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734119473] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:58:01,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:58:01,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 156 [2023-12-19 17:58:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578015146] [2023-12-19 17:58:01,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:58:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-12-19 17:58:01,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:58:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-12-19 17:58:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2809, Invalid=21371, Unknown=0, NotChecked=0, Total=24180 [2023-12-19 17:58:01,741 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:58:12,814 INFO L93 Difference]: Finished difference Result 207 states and 232 transitions. [2023-12-19 17:58:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-19 17:58:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-12-19 17:58:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:58:12,815 INFO L225 Difference]: With dead ends: 207 [2023-12-19 17:58:12,815 INFO L226 Difference]: Without dead ends: 129 [2023-12-19 17:58:12,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13661 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=5953, Invalid=47177, Unknown=0, NotChecked=0, Total=53130 [2023-12-19 17:58:12,817 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 157 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:58:12,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 108 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 17:58:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-19 17:58:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2023-12-19 17:58:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2023-12-19 17:58:13,059 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 100 [2023-12-19 17:58:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:58:13,059 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2023-12-19 17:58:13,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.891025641025641) internal successors, (295), 156 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2023-12-19 17:58:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-19 17:58:13,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:58:13,060 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-12-19 17:58:13,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-19 17:58:13,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-19 17:58:13,260 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:58:13,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:58:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1049923229, now seen corresponding path program 28 times [2023-12-19 17:58:13,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:58:13,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539429048] [2023-12-19 17:58:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:58:13,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:58:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:58:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 276 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:58:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539429048] [2023-12-19 17:58:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539429048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:58:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156429679] [2023-12-19 17:58:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:58:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:58:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:58:14,430 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:58:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 17:58:14,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:58:14,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:58:14,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-19 17:58:14,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:58:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:15,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:58:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:16,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156429679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:58:16,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:58:16,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-12-19 17:58:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652396787] [2023-12-19 17:58:16,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:58:16,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-12-19 17:58:16,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:58:16,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-12-19 17:58:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1707, Invalid=8799, Unknown=0, NotChecked=0, Total=10506 [2023-12-19 17:58:16,773 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:58:19,219 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2023-12-19 17:58:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-19 17:58:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-12-19 17:58:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:58:19,220 INFO L225 Difference]: With dead ends: 204 [2023-12-19 17:58:19,220 INFO L226 Difference]: Without dead ends: 202 [2023-12-19 17:58:19,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 127 SyntacticMatches, 24 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9838 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5821, Invalid=24629, Unknown=0, NotChecked=0, Total=30450 [2023-12-19 17:58:19,222 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 230 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:58:19,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 116 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 17:58:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-19 17:58:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 105. [2023-12-19 17:58:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-12-19 17:58:19,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2023-12-19 17:58:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:58:19,367 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-12-19 17:58:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 103 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-12-19 17:58:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-19 17:58:19,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:58:19,367 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-12-19 17:58:19,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-19 17:58:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:58:19,573 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:58:19,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:58:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1979076383, now seen corresponding path program 29 times [2023-12-19 17:58:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:58:19,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918599922] [2023-12-19 17:58:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:58:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:58:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:58:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:21,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:58:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918599922] [2023-12-19 17:58:21,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918599922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:58:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493458895] [2023-12-19 17:58:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:58:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:58:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:58:21,878 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:58:21,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-19 17:58:21,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-12-19 17:58:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:58:21,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 121 conjunts are in the unsatisfiable core [2023-12-19 17:58:21,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:58:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:23,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:58:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493458895] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:58:27,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:58:27,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 56] total 136 [2023-12-19 17:58:27,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172165490] [2023-12-19 17:58:27,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:58:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-12-19 17:58:27,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:58:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-12-19 17:58:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2649, Invalid=15711, Unknown=0, NotChecked=0, Total=18360 [2023-12-19 17:58:27,958 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:58:44,513 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2023-12-19 17:58:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-12-19 17:58:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-12-19 17:58:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:58:44,516 INFO L225 Difference]: With dead ends: 289 [2023-12-19 17:58:44,516 INFO L226 Difference]: Without dead ends: 208 [2023-12-19 17:58:44,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15495 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=7970, Invalid=49870, Unknown=0, NotChecked=0, Total=57840 [2023-12-19 17:58:44,519 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 640 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 6999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-19 17:58:44,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 725 Invalid, 6999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 6312 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-19 17:58:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-19 17:58:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 135. [2023-12-19 17:58:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 134 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2023-12-19 17:58:44,803 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 104 [2023-12-19 17:58:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:58:44,803 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2023-12-19 17:58:44,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:58:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2023-12-19 17:58:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-19 17:58:44,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:58:44,804 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-12-19 17:58:44,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-19 17:58:45,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:58:45,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:58:45,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:58:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1160999997, now seen corresponding path program 30 times [2023-12-19 17:58:45,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:58:45,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962020411] [2023-12-19 17:58:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:58:45,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:58:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:58:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:58:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962020411] [2023-12-19 17:58:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962020411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:58:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062802325] [2023-12-19 17:58:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:58:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:58:47,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:58:47,436 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:58:47,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-19 17:58:47,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-12-19 17:58:47,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:58:47,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-19 17:58:47,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:58:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:51,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:58:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:58:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062802325] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:58:56,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:58:56,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 60, 60] total 172 [2023-12-19 17:58:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144251199] [2023-12-19 17:58:56,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:58:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2023-12-19 17:58:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:58:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2023-12-19 17:58:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3378, Invalid=26034, Unknown=0, NotChecked=0, Total=29412 [2023-12-19 17:58:56,232 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:59:09,933 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2023-12-19 17:59:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-19 17:59:09,934 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 0 states have call successors, (0), 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 108 [2023-12-19 17:59:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:59:09,935 INFO L225 Difference]: With dead ends: 223 [2023-12-19 17:59:09,935 INFO L226 Difference]: Without dead ends: 139 [2023-12-19 17:59:09,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16860 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=7233, Invalid=57029, Unknown=0, NotChecked=0, Total=64262 [2023-12-19 17:59:09,938 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 194 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3556 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 4063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 17:59:09,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 124 Invalid, 4063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3556 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 17:59:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-19 17:59:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2023-12-19 17:59:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 134 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2023-12-19 17:59:10,222 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 108 [2023-12-19 17:59:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:59:10,222 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2023-12-19 17:59:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.8546511627906976) internal successors, (319), 172 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2023-12-19 17:59:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-19 17:59:10,223 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:59:10,223 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-12-19 17:59:10,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-19 17:59:10,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-19 17:59:10,428 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:59:10,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:59:10,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2089829347, now seen corresponding path program 31 times [2023-12-19 17:59:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:59:10,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057226296] [2023-12-19 17:59:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:59:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:59:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 325 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:59:11,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057226296] [2023-12-19 17:59:11,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057226296] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:59:11,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829646064] [2023-12-19 17:59:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:59:11,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:59:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:59:11,833 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:59:11,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-19 17:59:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:11,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-19 17:59:11,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:59:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:13,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:59:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:14,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829646064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:59:14,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:59:14,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2023-12-19 17:59:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948691188] [2023-12-19 17:59:14,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:59:14,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-12-19 17:59:14,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:59:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-12-19 17:59:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1978, Invalid=10232, Unknown=0, NotChecked=0, Total=12210 [2023-12-19 17:59:14,741 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:59:17,481 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2023-12-19 17:59:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-19 17:59:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-12-19 17:59:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:59:17,482 INFO L225 Difference]: With dead ends: 220 [2023-12-19 17:59:17,482 INFO L226 Difference]: Without dead ends: 218 [2023-12-19 17:59:17,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 137 SyntacticMatches, 26 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11542 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6773, Invalid=28759, Unknown=0, NotChecked=0, Total=35532 [2023-12-19 17:59:17,484 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 282 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:59:17,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 111 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 17:59:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-19 17:59:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 113. [2023-12-19 17:59:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-12-19 17:59:17,650 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2023-12-19 17:59:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:59:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-12-19 17:59:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 111 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-12-19 17:59:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-19 17:59:17,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:59:17,651 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-12-19 17:59:17,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-19 17:59:17,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-19 17:59:17,851 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:59:17,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:59:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1744671585, now seen corresponding path program 32 times [2023-12-19 17:59:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:59:17,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936082037] [2023-12-19 17:59:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:59:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:59:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:59:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936082037] [2023-12-19 17:59:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936082037] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:59:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403374664] [2023-12-19 17:59:20,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:59:20,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:59:20,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:59:20,437 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:59:20,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-19 17:59:20,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:59:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:59:20,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 116 conjunts are in the unsatisfiable core [2023-12-19 17:59:20,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:59:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:22,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:59:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403374664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:59:26,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:59:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 143 [2023-12-19 17:59:26,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603425995] [2023-12-19 17:59:26,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:59:26,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-12-19 17:59:26,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:59:26,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-12-19 17:59:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2913, Invalid=17393, Unknown=0, NotChecked=0, Total=20306 [2023-12-19 17:59:26,904 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:59:44,698 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2023-12-19 17:59:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-12-19 17:59:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 0 states have call successors, (0), 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 112 [2023-12-19 17:59:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:59:44,699 INFO L225 Difference]: With dead ends: 311 [2023-12-19 17:59:44,699 INFO L226 Difference]: Without dead ends: 224 [2023-12-19 17:59:44,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17332 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=8892, Invalid=56388, Unknown=0, NotChecked=0, Total=65280 [2023-12-19 17:59:44,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 715 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 6920 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 7715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 6920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-19 17:59:44,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 828 Invalid, 7715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 6920 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-19 17:59:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-19 17:59:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 145. [2023-12-19 17:59:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 144 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2023-12-19 17:59:45,032 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 112 [2023-12-19 17:59:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:59:45,032 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2023-12-19 17:59:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.125874125874126) internal successors, (304), 143 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:59:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2023-12-19 17:59:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-19 17:59:45,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:59:45,033 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-12-19 17:59:45,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-19 17:59:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-19 17:59:45,234 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:59:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:59:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1558733245, now seen corresponding path program 33 times [2023-12-19 17:59:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:59:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544208550] [2023-12-19 17:59:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:59:45,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:59:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:59:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544208550] [2023-12-19 17:59:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544208550] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:59:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705148197] [2023-12-19 17:59:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:59:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:59:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:59:48,145 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:59:48,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-19 17:59:48,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-12-19 17:59:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:59:48,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-19 17:59:48,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:59:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:52,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:59:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:59:57,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705148197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:59:57,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:59:57,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62, 62] total 180 [2023-12-19 17:59:57,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861880396] [2023-12-19 17:59:57,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:59:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2023-12-19 17:59:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:59:57,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2023-12-19 17:59:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3717, Invalid=28503, Unknown=0, NotChecked=0, Total=32220 [2023-12-19 17:59:57,613 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:00:13,269 INFO L93 Difference]: Finished difference Result 239 states and 268 transitions. [2023-12-19 18:00:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-19 18:00:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 0 states have call successors, (0), 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 116 [2023-12-19 18:00:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:00:13,270 INFO L225 Difference]: With dead ends: 239 [2023-12-19 18:00:13,270 INFO L226 Difference]: Without dead ends: 149 [2023-12-19 18:00:13,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18343 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=7883, Invalid=63139, Unknown=0, NotChecked=0, Total=71022 [2023-12-19 18:00:13,273 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 3709 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 3709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:00:13,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 120 Invalid, 4146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 3709 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-19 18:00:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-19 18:00:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2023-12-19 18:00:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 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) [2023-12-19 18:00:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2023-12-19 18:00:13,599 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 116 [2023-12-19 18:00:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:00:13,599 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2023-12-19 18:00:13,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.9055555555555554) internal successors, (343), 180 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2023-12-19 18:00:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-19 18:00:13,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:00:13,600 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-12-19 18:00:13,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-19 18:00:13,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:00:13,801 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:00:13,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:00:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1439615389, now seen corresponding path program 34 times [2023-12-19 18:00:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:00:13,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565053799] [2023-12-19 18:00:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:00:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:00:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:00:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 378 proven. 1164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:00:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565053799] [2023-12-19 18:00:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565053799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:00:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427514136] [2023-12-19 18:00:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:00:15,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:00:15,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:00:15,353 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:00:15,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-19 18:00:15,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:00:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:00:15,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-19 18:00:15,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:00:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:16,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:00:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427514136] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:00:18,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:00:18,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 119 [2023-12-19 18:00:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814083728] [2023-12-19 18:00:18,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:00:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-12-19 18:00:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:00:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-12-19 18:00:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2269, Invalid=11773, Unknown=0, NotChecked=0, Total=14042 [2023-12-19 18:00:18,345 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:00:21,499 INFO L93 Difference]: Finished difference Result 236 states and 264 transitions. [2023-12-19 18:00:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-12-19 18:00:21,499 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-12-19 18:00:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:00:21,500 INFO L225 Difference]: With dead ends: 236 [2023-12-19 18:00:21,500 INFO L226 Difference]: Without dead ends: 234 [2023-12-19 18:00:21,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 147 SyntacticMatches, 28 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13382 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7797, Invalid=33209, Unknown=0, NotChecked=0, Total=41006 [2023-12-19 18:00:21,503 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 260 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 18:00:21,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 124 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 18:00:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-12-19 18:00:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 121. [2023-12-19 18:00:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-12-19 18:00:21,711 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2023-12-19 18:00:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:00:21,712 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-12-19 18:00:21,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.504201680672269) internal successors, (179), 119 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-12-19 18:00:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-19 18:00:21,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:00:21,712 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-12-19 18:00:21,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-19 18:00:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-19 18:00:21,913 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:00:21,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:00:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1956538911, now seen corresponding path program 35 times [2023-12-19 18:00:21,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:00:21,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598381569] [2023-12-19 18:00:21,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:00:21,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:00:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:00:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:00:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598381569] [2023-12-19 18:00:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598381569] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:00:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239201278] [2023-12-19 18:00:24,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:00:24,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:00:24,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:00:24,930 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:00:24,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-19 18:00:25,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-12-19 18:00:25,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:00:25,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 134 conjunts are in the unsatisfiable core [2023-12-19 18:00:25,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:00:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:27,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:00:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239201278] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:00:32,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:00:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 64] total 156 [2023-12-19 18:00:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437044911] [2023-12-19 18:00:32,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:00:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-12-19 18:00:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:00:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-12-19 18:00:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3471, Invalid=20709, Unknown=0, NotChecked=0, Total=24180 [2023-12-19 18:00:32,813 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:00:55,130 INFO L93 Difference]: Finished difference Result 333 states and 366 transitions. [2023-12-19 18:00:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2023-12-19 18:00:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 0 states have call successors, (0), 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 120 [2023-12-19 18:00:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:00:55,131 INFO L225 Difference]: With dead ends: 333 [2023-12-19 18:00:55,131 INFO L226 Difference]: Without dead ends: 240 [2023-12-19 18:00:55,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20527 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=10448, Invalid=66004, Unknown=0, NotChecked=0, Total=76452 [2023-12-19 18:00:55,134 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 801 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 8158 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 9091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 8158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:00:55,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 918 Invalid, 9091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 8158 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-19 18:00:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-12-19 18:00:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 155. [2023-12-19 18:00:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2023-12-19 18:00:55,523 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 120 [2023-12-19 18:00:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:00:55,523 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2023-12-19 18:00:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.08974358974359) internal successors, (326), 156 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:00:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2023-12-19 18:00:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-19 18:00:55,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:00:55,524 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-12-19 18:00:55,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-19 18:00:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-19 18:00:55,725 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:00:55,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:00:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -942067907, now seen corresponding path program 36 times [2023-12-19 18:00:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:00:55,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48907776] [2023-12-19 18:00:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:00:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:00:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:00:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:00:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:00:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48907776] [2023-12-19 18:00:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48907776] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:00:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210543005] [2023-12-19 18:00:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:00:58,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:00:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:00:58,903 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:00:58,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-19 18:00:59,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2023-12-19 18:00:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:00:59,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 115 conjunts are in the unsatisfiable core [2023-12-19 18:00:59,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:01:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:03,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:01:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210543005] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:01:10,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:01:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 68, 68] total 196 [2023-12-19 18:01:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502998680] [2023-12-19 18:01:10,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:01:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-12-19 18:01:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:01:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-12-19 18:01:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4366, Invalid=33854, Unknown=0, NotChecked=0, Total=38220 [2023-12-19 18:01:10,298 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:01:29,070 INFO L93 Difference]: Finished difference Result 255 states and 286 transitions. [2023-12-19 18:01:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-19 18:01:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 0 states have call successors, (0), 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 124 [2023-12-19 18:01:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:01:29,072 INFO L225 Difference]: With dead ends: 255 [2023-12-19 18:01:29,072 INFO L226 Difference]: Without dead ends: 159 [2023-12-19 18:01:29,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22034 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=9339, Invalid=74471, Unknown=0, NotChecked=0, Total=83810 [2023-12-19 18:01:29,075 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 218 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 4870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:01:29,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 136 Invalid, 4870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-19 18:01:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-19 18:01:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2023-12-19 18:01:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 154 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2023-12-19 18:01:29,459 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 124 [2023-12-19 18:01:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:01:29,459 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2023-12-19 18:01:29,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.8724489795918366) internal successors, (367), 196 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2023-12-19 18:01:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-19 18:01:29,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:01:29,459 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-12-19 18:01:29,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-19 18:01:29,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:01:29,661 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:01:29,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:01:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1085688035, now seen corresponding path program 37 times [2023-12-19 18:01:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:01:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506804937] [2023-12-19 18:01:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:01:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:01:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:01:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 435 proven. 1337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:01:31,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506804937] [2023-12-19 18:01:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506804937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:01:31,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793112618] [2023-12-19 18:01:31,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:01:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:01:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:01:31,415 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:01:31,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-19 18:01:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:01:31,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-19 18:01:31,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:01:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:32,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:01:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 0 proven. 1772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793112618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:01:34,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:01:34,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-12-19 18:01:34,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24439225] [2023-12-19 18:01:34,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:01:34,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-12-19 18:01:34,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:01:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-12-19 18:01:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2580, Invalid=13422, Unknown=0, NotChecked=0, Total=16002 [2023-12-19 18:01:34,752 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:01:38,368 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2023-12-19 18:01:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-19 18:01:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-12-19 18:01:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:01:38,370 INFO L225 Difference]: With dead ends: 252 [2023-12-19 18:01:38,370 INFO L226 Difference]: Without dead ends: 250 [2023-12-19 18:01:38,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 157 SyntacticMatches, 30 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15358 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8893, Invalid=37979, Unknown=0, NotChecked=0, Total=46872 [2023-12-19 18:01:38,372 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 310 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 18:01:38,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 133 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 18:01:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-19 18:01:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 129. [2023-12-19 18:01:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-12-19 18:01:38,622 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2023-12-19 18:01:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:01:38,622 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-12-19 18:01:38,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.5039370078740157) internal successors, (191), 127 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:01:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-12-19 18:01:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-19 18:01:38,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:01:38,623 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-12-19 18:01:38,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-19 18:01:38,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-19 18:01:38,823 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:01:38,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:01:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1671280737, now seen corresponding path program 38 times [2023-12-19 18:01:38,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:01:38,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889756086] [2023-12-19 18:01:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:01:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:01:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:01:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:42,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:01:42,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889756086] [2023-12-19 18:01:42,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889756086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:01:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6587635] [2023-12-19 18:01:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:01:42,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:01:42,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:01:42,170 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:01:42,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-19 18:01:42,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:01:42,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:01:42,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-19 18:01:42,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:01:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:44,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:01:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:01:50,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6587635] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:01:50,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:01:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 163 [2023-12-19 18:01:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661292911] [2023-12-19 18:01:50,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:01:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-12-19 18:01:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:01:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-12-19 18:01:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3775, Invalid=22631, Unknown=0, NotChecked=0, Total=26406 [2023-12-19 18:01:50,391 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:02:14,712 INFO L93 Difference]: Finished difference Result 355 states and 390 transitions. [2023-12-19 18:02:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-12-19 18:02:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 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 128 [2023-12-19 18:02:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:02:14,713 INFO L225 Difference]: With dead ends: 355 [2023-12-19 18:02:14,713 INFO L226 Difference]: Without dead ends: 256 [2023-12-19 18:02:14,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22632 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=11502, Invalid=73470, Unknown=0, NotChecked=0, Total=84972 [2023-12-19 18:02:14,717 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 885 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 9058 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 10095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 9058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:02:14,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1078 Invalid, 10095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 9058 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-19 18:02:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-12-19 18:02:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2023-12-19 18:02:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.201219512195122) internal successors, (197), 164 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 197 transitions. [2023-12-19 18:02:15,178 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 197 transitions. Word has length 128 [2023-12-19 18:02:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:02:15,178 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 197 transitions. [2023-12-19 18:02:15,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 197 transitions. [2023-12-19 18:02:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-19 18:02:15,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:02:15,179 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-12-19 18:02:15,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-19 18:02:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:02:15,381 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:02:15,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:02:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -576856899, now seen corresponding path program 39 times [2023-12-19 18:02:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:02:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146929123] [2023-12-19 18:02:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:02:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:02:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:02:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:18,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:02:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146929123] [2023-12-19 18:02:18,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146929123] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:02:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463599552] [2023-12-19 18:02:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:02:18,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:02:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:02:18,939 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:02:18,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-19 18:02:19,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-12-19 18:02:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:02:19,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-19 18:02:19,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:02:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:23,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:02:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:30,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463599552] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:02:30,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:02:30,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 70, 70] total 204 [2023-12-19 18:02:30,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760246037] [2023-12-19 18:02:30,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:02:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-12-19 18:02:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:02:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-12-19 18:02:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=36659, Unknown=0, NotChecked=0, Total=41412 [2023-12-19 18:02:30,927 INFO L87 Difference]: Start difference. First operand 165 states and 197 transitions. Second operand has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:02:52,176 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2023-12-19 18:02:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-19 18:02:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-12-19 18:02:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:02:52,177 INFO L225 Difference]: With dead ends: 271 [2023-12-19 18:02:52,177 INFO L226 Difference]: Without dead ends: 169 [2023-12-19 18:02:52,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23713 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=10085, Invalid=81421, Unknown=0, NotChecked=0, Total=91506 [2023-12-19 18:02:52,181 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 175 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4681 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 5244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:02:52,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 135 Invalid, 5244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4681 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-19 18:02:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-19 18:02:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2023-12-19 18:02:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1951219512195121) internal successors, (196), 164 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2023-12-19 18:02:52,642 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 132 [2023-12-19 18:02:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:02:52,642 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2023-12-19 18:02:52,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.9166666666666667) internal successors, (391), 204 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:02:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2023-12-19 18:02:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-19 18:02:52,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:02:52,643 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-12-19 18:02:52,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-19 18:02:52,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:02:52,844 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:02:52,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:02:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash 930645149, now seen corresponding path program 40 times [2023-12-19 18:02:52,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:02:52,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123031049] [2023-12-19 18:02:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:02:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:02:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:02:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 496 proven. 1522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:02:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123031049] [2023-12-19 18:02:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123031049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:02:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305610626] [2023-12-19 18:02:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:02:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:02:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:02:54,802 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:02:54,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-19 18:02:54,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:02:54,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:02:54,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-19 18:02:54,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:02:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:56,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:02:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:02:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305610626] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:02:58,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:02:58,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 135 [2023-12-19 18:02:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790645860] [2023-12-19 18:02:58,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:02:58,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2023-12-19 18:02:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:02:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2023-12-19 18:02:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=15179, Unknown=0, NotChecked=0, Total=18090 [2023-12-19 18:02:58,627 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:03:02,681 INFO L93 Difference]: Finished difference Result 268 states and 300 transitions. [2023-12-19 18:03:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-19 18:03:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 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 133 [2023-12-19 18:03:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:03:02,682 INFO L225 Difference]: With dead ends: 268 [2023-12-19 18:03:02,682 INFO L226 Difference]: Without dead ends: 266 [2023-12-19 18:03:02,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 167 SyntacticMatches, 32 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17470 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10061, Invalid=43069, Unknown=0, NotChecked=0, Total=53130 [2023-12-19 18:03:02,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 334 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:03:02,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 129 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 18:03:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-19 18:03:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 137. [2023-12-19 18:03:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-12-19 18:03:02,963 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2023-12-19 18:03:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:03:02,963 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-12-19 18:03:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-12-19 18:03:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-19 18:03:02,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:03:02,965 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-12-19 18:03:02,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-19 18:03:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-19 18:03:03,165 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:03:03,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:03:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 840563425, now seen corresponding path program 41 times [2023-12-19 18:03:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:03:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891756337] [2023-12-19 18:03:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:03:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:03:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:03:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1426 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:03:06,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:03:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891756337] [2023-12-19 18:03:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891756337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:03:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012597738] [2023-12-19 18:03:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:03:06,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:03:06,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:03:06,937 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:03:06,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-19 18:03:07,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2023-12-19 18:03:07,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:03:07,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 151 conjunts are in the unsatisfiable core [2023-12-19 18:03:07,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:03:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:03:09,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:03:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:03:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012597738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:03:16,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:03:16,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 72, 74] total 179 [2023-12-19 18:03:16,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748935946] [2023-12-19 18:03:16,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:03:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2023-12-19 18:03:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:03:16,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2023-12-19 18:03:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=27283, Unknown=0, NotChecked=0, Total=31862 [2023-12-19 18:03:16,752 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:03:44,732 INFO L93 Difference]: Finished difference Result 377 states and 414 transitions. [2023-12-19 18:03:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-12-19 18:03:44,732 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-12-19 18:03:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:03:44,733 INFO L225 Difference]: With dead ends: 377 [2023-12-19 18:03:44,733 INFO L226 Difference]: Without dead ends: 272 [2023-12-19 18:03:44,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26968 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=13586, Invalid=85954, Unknown=0, NotChecked=0, Total=99540 [2023-12-19 18:03:44,737 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 976 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 10788 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 11979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 10788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-19 18:03:44,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1221 Invalid, 11979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 10788 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-19 18:03:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-12-19 18:03:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 175. [2023-12-19 18:03:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2011494252873562) internal successors, (209), 174 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 209 transitions. [2023-12-19 18:03:45,271 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 209 transitions. Word has length 136 [2023-12-19 18:03:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:03:45,271 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 209 transitions. [2023-12-19 18:03:45,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.0670391061452515) internal successors, (370), 179 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:03:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 209 transitions. [2023-12-19 18:03:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-19 18:03:45,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:03:45,272 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-12-19 18:03:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-19 18:03:45,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-19 18:03:45,473 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:03:45,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:03:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -473011651, now seen corresponding path program 42 times [2023-12-19 18:03:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:03:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763336284] [2023-12-19 18:03:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:03:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:03:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:03:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1520 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:03:49,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:03:49,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763336284] [2023-12-19 18:03:49,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763336284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:03:49,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989147147] [2023-12-19 18:03:49,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:03:49,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:03:49,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:03:49,526 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:03:49,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-19 18:03:49,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-12-19 18:03:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:03:49,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-19 18:03:49,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:03:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:03:55,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:04:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989147147] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:04:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:04:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 76, 76] total 220 [2023-12-19 18:04:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113653886] [2023-12-19 18:04:04,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:04:04,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 220 states [2023-12-19 18:04:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:04:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2023-12-19 18:04:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5482, Invalid=42698, Unknown=0, NotChecked=0, Total=48180 [2023-12-19 18:04:04,620 INFO L87 Difference]: Start difference. First operand 175 states and 209 transitions. Second operand has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:04:30,308 INFO L93 Difference]: Finished difference Result 287 states and 322 transitions. [2023-12-19 18:04:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-12-19 18:04:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 0 states have call successors, (0), 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 140 [2023-12-19 18:04:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:04:30,309 INFO L225 Difference]: With dead ends: 287 [2023-12-19 18:04:30,309 INFO L226 Difference]: Without dead ends: 179 [2023-12-19 18:04:30,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27981 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=11718, Invalid=94232, Unknown=0, NotChecked=0, Total=105950 [2023-12-19 18:04:30,313 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 5929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:04:30,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 143 Invalid, 5929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-19 18:04:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-19 18:04:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2023-12-19 18:04:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 174 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2023-12-19 18:04:30,846 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 140 [2023-12-19 18:04:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:04:30,846 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2023-12-19 18:04:30,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 220 states, 220 states have (on average 1.8863636363636365) internal successors, (415), 220 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2023-12-19 18:04:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-19 18:04:30,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:04:30,847 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-12-19 18:04:30,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-19 18:04:31,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-19 18:04:31,052 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:04:31,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:04:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 603140637, now seen corresponding path program 43 times [2023-12-19 18:04:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:04:31,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995176888] [2023-12-19 18:04:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:04:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:04:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:04:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 561 proven. 1719 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:04:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995176888] [2023-12-19 18:04:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995176888] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:04:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260223001] [2023-12-19 18:04:33,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 18:04:33,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:04:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:04:33,239 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:04:33,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-19 18:04:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:04:33,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-19 18:04:33,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:04:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:35,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:04:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260223001] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:04:37,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:04:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 143 [2023-12-19 18:04:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555227710] [2023-12-19 18:04:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:04:37,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-12-19 18:04:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:04:37,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-12-19 18:04:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3262, Invalid=17044, Unknown=0, NotChecked=0, Total=20306 [2023-12-19 18:04:37,510 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:04:42,055 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2023-12-19 18:04:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-19 18:04:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-12-19 18:04:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:04:42,056 INFO L225 Difference]: With dead ends: 284 [2023-12-19 18:04:42,056 INFO L226 Difference]: Without dead ends: 282 [2023-12-19 18:04:42,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 177 SyntacticMatches, 34 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19718 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=11301, Invalid=48479, Unknown=0, NotChecked=0, Total=59780 [2023-12-19 18:04:42,060 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 308 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:04:42,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 141 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 18:04:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-19 18:04:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 145. [2023-12-19 18:04:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-12-19 18:04:42,374 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2023-12-19 18:04:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:04:42,374 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-12-19 18:04:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:04:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-12-19 18:04:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-19 18:04:42,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:04:42,375 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-12-19 18:04:42,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-19 18:04:42,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:04:42,575 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:04:42,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:04:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1975624351, now seen corresponding path program 44 times [2023-12-19 18:04:42,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:04:42,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052447627] [2023-12-19 18:04:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:04:42,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:04:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:04:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1617 proven. 764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:04:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052447627] [2023-12-19 18:04:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052447627] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:04:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727833274] [2023-12-19 18:04:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 18:04:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:04:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:04:46,819 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:04:46,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-19 18:04:46,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 18:04:46,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:04:46,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 148 conjunts are in the unsatisfiable core [2023-12-19 18:04:46,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:04:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:49,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:04:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:04:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727833274] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:04:56,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:04:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 183 [2023-12-19 18:04:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30911893] [2023-12-19 18:04:56,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:04:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2023-12-19 18:04:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:04:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2023-12-19 18:04:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4749, Invalid=28557, Unknown=0, NotChecked=0, Total=33306 [2023-12-19 18:04:56,965 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 183 states, 183 states have (on average 2.1420765027322406) internal successors, (392), 183 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:05:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:05:28,331 INFO L93 Difference]: Finished difference Result 399 states and 438 transitions. [2023-12-19 18:05:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2023-12-19 18:05:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 2.1420765027322406) internal successors, (392), 183 states have internal predecessors, (392), 0 states have call successors, (0), 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 144 [2023-12-19 18:05:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:05:28,332 INFO L225 Difference]: With dead ends: 399 [2023-12-19 18:05:28,332 INFO L226 Difference]: Without dead ends: 288 [2023-12-19 18:05:28,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28636 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=14448, Invalid=92808, Unknown=0, NotChecked=0, Total=107256 [2023-12-19 18:05:28,336 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1061 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 11925 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 13235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 11925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:05:28,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1366 Invalid, 13235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 11925 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-19 18:05:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-12-19 18:05:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 185. [2023-12-19 18:05:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.201086956521739) internal successors, (221), 184 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:05:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 221 transitions. [2023-12-19 18:05:28,968 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 221 transitions. Word has length 144 [2023-12-19 18:05:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:05:28,968 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 221 transitions. [2023-12-19 18:05:28,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 2.1420765027322406) internal successors, (392), 183 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:05:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 221 transitions. [2023-12-19 18:05:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-19 18:05:28,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:05:28,969 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-12-19 18:05:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-19 18:05:29,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-19 18:05:29,169 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:05:29,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:05:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1912416323, now seen corresponding path program 45 times [2023-12-19 18:05:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:05:29,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129207167] [2023-12-19 18:05:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:05:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:05:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1717 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:05:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:05:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129207167] [2023-12-19 18:05:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129207167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:05:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713348840] [2023-12-19 18:05:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 18:05:33,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:05:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:05:33,603 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:05:33,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-19 18:05:33,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2023-12-19 18:05:33,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:05:33,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-19 18:05:33,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:05:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:05:39,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:05:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:05:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713348840] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:05:48,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:05:48,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 78, 78] total 228 [2023-12-19 18:05:48,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017606023] [2023-12-19 18:05:48,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:05:48,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2023-12-19 18:05:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:05:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2023-12-19 18:05:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5917, Invalid=45839, Unknown=0, NotChecked=0, Total=51756 [2023-12-19 18:05:48,371 INFO L87 Difference]: Start difference. First operand 185 states and 221 transitions. Second operand has 228 states, 228 states have (on average 1.9254385964912282) internal successors, (439), 228 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:06:17,778 INFO L93 Difference]: Finished difference Result 303 states and 340 transitions. [2023-12-19 18:06:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-12-19 18:06:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.9254385964912282) internal successors, (439), 228 states have internal predecessors, (439), 0 states have call successors, (0), 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 148 [2023-12-19 18:06:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:06:17,779 INFO L225 Difference]: With dead ends: 303 [2023-12-19 18:06:17,779 INFO L226 Difference]: Without dead ends: 189 [2023-12-19 18:06:17,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29771 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=12559, Invalid=102023, Unknown=0, NotChecked=0, Total=114582 [2023-12-19 18:06:17,783 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 190 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 6869 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 7574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 6869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-19 18:06:17,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 177 Invalid, 7574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 6869 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-19 18:06:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-19 18:06:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2023-12-19 18:06:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1956521739130435) internal successors, (220), 184 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 220 transitions. [2023-12-19 18:06:18,435 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 220 transitions. Word has length 148 [2023-12-19 18:06:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:06:18,435 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 220 transitions. [2023-12-19 18:06:18,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.9254385964912282) internal successors, (439), 228 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 220 transitions. [2023-12-19 18:06:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-19 18:06:18,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:06:18,436 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-12-19 18:06:18,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-19 18:06:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-19 18:06:18,637 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:06:18,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:06:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1481752477, now seen corresponding path program 46 times [2023-12-19 18:06:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:06:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914742954] [2023-12-19 18:06:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:06:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:06:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:06:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 630 proven. 1928 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:21,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:06:21,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914742954] [2023-12-19 18:06:21,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914742954] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:06:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830805278] [2023-12-19 18:06:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 18:06:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:06:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:06:21,246 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:06:21,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-19 18:06:21,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 18:06:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:06:21,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-19 18:06:21,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:06:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:23,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:06:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830805278] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:06:26,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:06:26,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 151 [2023-12-19 18:06:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408338667] [2023-12-19 18:06:26,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:06:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-12-19 18:06:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:06:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-12-19 18:06:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3633, Invalid=19017, Unknown=0, NotChecked=0, Total=22650 [2023-12-19 18:06:26,038 INFO L87 Difference]: Start difference. First operand 185 states and 220 transitions. Second operand has 151 states, 151 states have (on average 1.5033112582781456) internal successors, (227), 151 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:06:31,327 INFO L93 Difference]: Finished difference Result 300 states and 336 transitions. [2023-12-19 18:06:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-12-19 18:06:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.5033112582781456) internal successors, (227), 151 states have internal predecessors, (227), 0 states have call successors, (0), 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 149 [2023-12-19 18:06:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:06:31,341 INFO L225 Difference]: With dead ends: 300 [2023-12-19 18:06:31,341 INFO L226 Difference]: Without dead ends: 298 [2023-12-19 18:06:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 187 SyntacticMatches, 36 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22102 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=12613, Invalid=54209, Unknown=0, NotChecked=0, Total=66822 [2023-12-19 18:06:31,344 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 344 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:06:31,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 143 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 18:06:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-19 18:06:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 153. [2023-12-19 18:06:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-12-19 18:06:31,720 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2023-12-19 18:06:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:06:31,720 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-12-19 18:06:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.5033112582781456) internal successors, (227), 151 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:06:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-12-19 18:06:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-19 18:06:31,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:06:31,721 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-12-19 18:06:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-19 18:06:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:06:31,927 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:06:31,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:06:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash -781000735, now seen corresponding path program 47 times [2023-12-19 18:06:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:06:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633187882] [2023-12-19 18:06:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:06:31,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:06:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:06:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 1820 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:06:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633187882] [2023-12-19 18:06:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633187882] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:06:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627161080] [2023-12-19 18:06:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 18:06:36,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:06:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:06:36,785 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:06:36,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-19 18:06:36,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-12-19 18:06:36,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:06:36,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 175 conjunts are in the unsatisfiable core [2023-12-19 18:06:36,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:06:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:40,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:06:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:06:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627161080] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:06:48,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:06:48,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 80, 81] total 198 [2023-12-19 18:06:48,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576307458] [2023-12-19 18:06:48,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:06:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2023-12-19 18:06:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:06:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2023-12-19 18:06:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5587, Invalid=33419, Unknown=0, NotChecked=0, Total=39006 [2023-12-19 18:06:48,988 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 198 states, 198 states have (on average 2.090909090909091) internal successors, (414), 198 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:07:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:07:26,414 INFO L93 Difference]: Finished difference Result 421 states and 462 transitions. [2023-12-19 18:07:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2023-12-19 18:07:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 2.090909090909091) internal successors, (414), 198 states have internal predecessors, (414), 0 states have call successors, (0), 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 152 [2023-12-19 18:07:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:07:26,415 INFO L225 Difference]: With dead ends: 421 [2023-12-19 18:07:26,415 INFO L226 Difference]: Without dead ends: 304 [2023-12-19 18:07:26,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33324 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=16650, Invalid=106200, Unknown=0, NotChecked=0, Total=122850 [2023-12-19 18:07:26,421 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1169 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 12937 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 14410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 12937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-19 18:07:26,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1471 Invalid, 14410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 12937 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-19 18:07:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-12-19 18:07:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 195. [2023-12-19 18:07:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.2010309278350515) internal successors, (233), 194 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:07:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2023-12-19 18:07:27,151 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 152 [2023-12-19 18:07:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:07:27,151 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2023-12-19 18:07:27,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 2.090909090909091) internal successors, (414), 198 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 18:07:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2023-12-19 18:07:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-19 18:07:27,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:07:27,152 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-12-19 18:07:27,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-12-19 18:07:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-19 18:07:27,358 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:07:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:07:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2110989629, now seen corresponding path program 48 times [2023-12-19 18:07:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:07:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336935355] [2023-12-19 18:07:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:07:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:07:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:07:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 1926 proven. 887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:07:32,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:07:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336935355] [2023-12-19 18:07:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336935355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:07:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962270760] [2023-12-19 18:07:32,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:07:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:07:32,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:07:32,329 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 18:07:32,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-19 18:07:32,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2023-12-19 18:07:32,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:07:32,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-19 18:07:32,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:07:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:07:39,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:07:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 18:07:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962270760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:07:48,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:07:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 82, 82] total 240 [2023-12-19 18:07:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388338025] [2023-12-19 18:07:48,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:07:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 240 states [2023-12-19 18:07:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:07:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2023-12-19 18:07:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6547, Invalid=50813, Unknown=0, NotChecked=0, Total=57360 [2023-12-19 18:07:48,851 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 240 states, 240 states have (on average 1.9291666666666667) internal successors, (463), 240 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-19 18:08:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-19 18:08:12,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26976 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=10935, Invalid=89237, Unknown=0, NotChecked=0, Total=100172 [2023-12-19 18:08:12,941 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 130 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3988 mSolverCounterSat, 788 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 788 IncrementalHoareTripleChecker+Valid, 3988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-19 18:08:12,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 52 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [788 Valid, 3988 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-19 18:08:12,942 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 18:08:12,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-19 18:08:12,979 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:08:12,979 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:08:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:08:13,143 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (195states) and FLOYD_HOARE automaton (currently 83 states, 240 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 317 known predicates. [2023-12-19 18:08:13,147 INFO L445 BasicCegarLoop]: Path program histogram: [48, 2, 1, 1, 1] [2023-12-19 18:08:13,149 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 18:08:13,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:08:13 BoogieIcfgContainer [2023-12-19 18:08:13,150 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 18:08:13,151 INFO L158 Benchmark]: Toolchain (without parser) took 818601.07ms. Allocated memory was 296.7MB in the beginning and 889.2MB in the end (delta: 592.4MB). Free memory was 260.1MB in the beginning and 301.7MB in the end (delta: -41.5MB). Peak memory consumption was 551.7MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,151 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 199.2MB. Free memory is still 147.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 18:08:13,151 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.59ms. Allocated memory is still 296.7MB. Free memory was 260.1MB in the beginning and 249.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,152 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.46ms. Allocated memory is still 296.7MB. Free memory was 249.1MB in the beginning and 247.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,152 INFO L158 Benchmark]: Boogie Preprocessor took 19.08ms. Allocated memory is still 296.7MB. Free memory was 247.5MB in the beginning and 246.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,152 INFO L158 Benchmark]: RCFGBuilder took 178.24ms. Allocated memory is still 296.7MB. Free memory was 246.0MB in the beginning and 236.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,155 INFO L158 Benchmark]: TraceAbstraction took 818211.92ms. Allocated memory was 296.7MB in the beginning and 889.2MB in the end (delta: 592.4MB). Free memory was 235.0MB in the beginning and 301.7MB in the end (delta: -66.7MB). Peak memory consumption was 526.5MB. Max. memory is 8.0GB. [2023-12-19 18:08:13,156 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 199.2MB. Free memory is still 147.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 162.59ms. Allocated memory is still 296.7MB. Free memory was 260.1MB in the beginning and 249.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.46ms. Allocated memory is still 296.7MB. Free memory was 249.1MB in the beginning and 247.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.08ms. Allocated memory is still 296.7MB. Free memory was 247.5MB in the beginning and 246.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 178.24ms. Allocated memory is still 296.7MB. Free memory was 246.0MB in the beginning and 236.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 818211.92ms. Allocated memory was 296.7MB in the beginning and 889.2MB in the end (delta: 592.4MB). Free memory was 235.0MB in the beginning and 301.7MB in the end (delta: -66.7MB). Peak memory consumption was 526.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (195states) and FLOYD_HOARE automaton (currently 83 states, 240 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 317 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 818.2s, OverallIterations: 53, TraceHistogramMax: 38, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.0s, AutomataDifference: 470.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15640 SdHoareTripleChecker+Valid, 66.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15640 mSDsluCounter, 15435 SdHoareTripleChecker+Invalid, 56.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15180 mSDsCounter, 18689 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 159600 IncrementalHoareTripleChecker+Invalid, 178289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18689 mSolverCounterUnsat, 255 mSDtfsCounter, 159600 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14278 GetRequests, 4817 SyntacticMatches, 249 SemanticMatches, 9211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592998 ImplicationChecksByTransitivity, 629.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=286occurred in iteration=28, InterpolantAutomatonStates: 4760, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.1s AutomataMinimizationTime, 52 MinimizatonAttempts, 3227 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 322.4s InterpolantComputationTime, 8488 NumberOfCodeBlocks, 8488 NumberOfCodeBlocksAsserted, 624 NumberOfCheckSat, 12561 ConstructedInterpolants, 0 QuantifiedInterpolants, 214258 SizeOfPredicates, 301 NumberOfNonLiveVariables, 16425 ConjunctsInSsa, 4181 ConjunctsInUnsatCore, 154 InterpolantComputations, 3 PerfectInterpolantSequences, 27554/152857 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown