/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-64bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-25 22:59:51,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-25 22:59:51,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2023-12-25 22:59:51,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-25 22:59:51,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-25 22:59:51,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-25 22:59:51,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-25 22:59:51,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-25 22:59:51,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-25 22:59:51,865 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-25 22:59:51,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-25 22:59:51,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-25 22:59:51,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-25 22:59:51,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-25 22:59:51,867 INFO L153 SettingsManager]: * Use SBE=true [2023-12-25 22:59:51,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-25 22:59:51,867 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-25 22:59:51,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-25 22:59:51,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-25 22:59:51,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-25 22:59:51,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-25 22:59:51,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-25 22:59:51,872 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-25 22:59:51,872 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-25 22:59:51,872 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-25 22:59:51,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-25 22:59:51,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-25 22:59:51,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-25 22:59:51,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-25 22:59:51,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 22:59:51,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-25 22:59:51,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-25 22:59:51,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-25 22:59:51,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-25 22:59:51,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-25 22:59:52,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-25 22:59:52,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-25 22:59:52,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-25 22:59:52,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-25 22:59:52,078 INFO L274 PluginConnector]: CDTParser initialized [2023-12-25 22:59:52,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c [2023-12-25 22:59:53,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-25 22:59:53,271 INFO L384 CDTParser]: Found 1 translation units. [2023-12-25 22:59:53,271 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c [2023-12-25 22:59:53,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f40bae10/f38ab62321b745df9ede90ff8032f3e5/FLAGc25e2cb2b [2023-12-25 22:59:53,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f40bae10/f38ab62321b745df9ede90ff8032f3e5 [2023-12-25 22:59:53,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-25 22:59:53,294 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-25 22:59:53,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-25 22:59:53,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-25 22:59:53,301 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-25 22:59:53,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f94f916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53, skipping insertion in model container [2023-12-25 22:59:53,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,329 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-25 22:59:53,431 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c[1266,1279] [2023-12-25 22:59:53,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 22:59:53,467 INFO L202 MainTranslator]: Completed pre-run [2023-12-25 22:59:53,475 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c[1266,1279] [2023-12-25 22:59:53,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 22:59:53,503 INFO L206 MainTranslator]: Completed translation [2023-12-25 22:59:53,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53 WrapperNode [2023-12-25 22:59:53,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-25 22:59:53,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-25 22:59:53,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-25 22:59:53,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-25 22:59:53,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,574 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 283 [2023-12-25 22:59:53,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-25 22:59:53,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-25 22:59:53,575 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-25 22:59:53,575 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-25 22:59:53,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,622 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]. [2023-12-25 22:59:53,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-25 22:59:53,650 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-25 22:59:53,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-25 22:59:53,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-25 22:59:53,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (1/1) ... [2023-12-25 22:59:53,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 22:59:53,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 22:59:53,674 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) [2023-12-25 22:59:53,684 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 [2023-12-25 22:59:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-25 22:59:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-25 22:59:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-25 22:59:53,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-25 22:59:53,774 INFO L241 CfgBuilder]: Building ICFG [2023-12-25 22:59:53,776 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-25 22:59:53,989 INFO L282 CfgBuilder]: Performing block encoding [2023-12-25 22:59:54,006 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-25 22:59:54,007 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-25 22:59:54,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 10:59:54 BoogieIcfgContainer [2023-12-25 22:59:54,007 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-25 22:59:54,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-25 22:59:54,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-25 22:59:54,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-25 22:59:54,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.12 10:59:53" (1/3) ... [2023-12-25 22:59:54,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515beb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 10:59:54, skipping insertion in model container [2023-12-25 22:59:54,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 10:59:53" (2/3) ... [2023-12-25 22:59:54,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515beb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 10:59:54, skipping insertion in model container [2023-12-25 22:59:54,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 10:59:54" (3/3) ... [2023-12-25 22:59:54,038 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p16.c [2023-12-25 22:59:54,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-25 22:59:54,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-25 22:59:54,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-25 22:59:54,084 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;@476f7b1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-25 22:59:54,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-25 22:59:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-25 22:59:54,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:54,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:54,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:54,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2037151720, now seen corresponding path program 1 times [2023-12-25 22:59:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:54,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074293597] [2023-12-25 22:59:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074293597] [2023-12-25 22:59:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074293597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:54,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-25 22:59:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093400116] [2023-12-25 22:59:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-25 22:59:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-25 22:59:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 22:59:54,607 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:54,637 INFO L93 Difference]: Finished difference Result 60 states and 96 transitions. [2023-12-25 22:59:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-25 22:59:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-25 22:59:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:54,643 INFO L225 Difference]: With dead ends: 60 [2023-12-25 22:59:54,643 INFO L226 Difference]: Without dead ends: 35 [2023-12-25 22:59:54,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 22:59:54,647 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:54,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 139 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 22:59:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-25 22:59:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-25 22:59:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 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) [2023-12-25 22:59:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2023-12-25 22:59:54,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 20 [2023-12-25 22:59:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:54,671 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2023-12-25 22:59:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2023-12-25 22:59:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-25 22:59:54,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:54,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-25 22:59:54,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:54,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1274531164, now seen corresponding path program 1 times [2023-12-25 22:59:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:54,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652683860] [2023-12-25 22:59:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:54,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652683860] [2023-12-25 22:59:54,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652683860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:54,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:54,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-25 22:59:54,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666967495] [2023-12-25 22:59:54,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-25 22:59:54,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-25 22:59:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 22:59:54,818 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-12-25 22:59:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:54,849 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2023-12-25 22:59:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-25 22:59:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) Word has length 21 [2023-12-25 22:59:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:54,850 INFO L225 Difference]: With dead ends: 63 [2023-12-25 22:59:54,850 INFO L226 Difference]: Without dead ends: 38 [2023-12-25 22:59:54,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-25 22:59:54,853 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:54,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 137 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 22:59:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-25 22:59:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-12-25 22:59:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2023-12-25 22:59:54,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 21 [2023-12-25 22:59:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:54,862 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2023-12-25 22:59:54,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-12-25 22:59:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2023-12-25 22:59:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-25 22:59:54,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:54,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:54,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-25 22:59:54,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:54,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash 645328050, now seen corresponding path program 1 times [2023-12-25 22:59:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031525662] [2023-12-25 22:59:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:55,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031525662] [2023-12-25 22:59:55,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031525662] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:55,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-25 22:59:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185817428] [2023-12-25 22:59:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-25 22:59:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-25 22:59:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-25 22:59:55,193 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2023-12-25 22:59:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:55,379 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2023-12-25 22:59:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-25 22:59:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-25 22:59:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:55,381 INFO L225 Difference]: With dead ends: 124 [2023-12-25 22:59:55,381 INFO L226 Difference]: Without dead ends: 97 [2023-12-25 22:59:55,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-25 22:59:55,385 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 178 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:55,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 235 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 22:59:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-25 22:59:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 43. [2023-12-25 22:59:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 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) [2023-12-25 22:59:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2023-12-25 22:59:55,395 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 22 [2023-12-25 22:59:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:55,395 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2023-12-25 22:59:55,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2023-12-25 22:59:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2023-12-25 22:59:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-25 22:59:55,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:55,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:55,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-25 22:59:55,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:55,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1874631884, now seen corresponding path program 1 times [2023-12-25 22:59:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:55,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269746799] [2023-12-25 22:59:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:55,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:55,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:55,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269746799] [2023-12-25 22:59:55,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269746799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:55,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:55,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-25 22:59:55,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121568167] [2023-12-25 22:59:55,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:55,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-25 22:59:55,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-25 22:59:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-25 22:59:55,869 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2023-12-25 22:59:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:55,997 INFO L93 Difference]: Finished difference Result 139 states and 196 transitions. [2023-12-25 22:59:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-25 22:59:55,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-25 22:59:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:56,001 INFO L225 Difference]: With dead ends: 139 [2023-12-25 22:59:56,001 INFO L226 Difference]: Without dead ends: 106 [2023-12-25 22:59:56,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-25 22:59:56,010 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 191 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:56,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 234 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 22:59:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-25 22:59:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 47. [2023-12-25 22:59:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 46 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2023-12-25 22:59:56,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 22 [2023-12-25 22:59:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:56,015 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2023-12-25 22:59:56,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2023-12-25 22:59:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2023-12-25 22:59:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-25 22:59:56,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:56,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-25 22:59:56,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:56,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 130239938, now seen corresponding path program 1 times [2023-12-25 22:59:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839456829] [2023-12-25 22:59:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:56,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839456829] [2023-12-25 22:59:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839456829] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:56,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-25 22:59:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434914426] [2023-12-25 22:59:56,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 22:59:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 22:59:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-25 22:59:56,210 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2023-12-25 22:59:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:56,391 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2023-12-25 22:59:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-25 22:59:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 23 [2023-12-25 22:59:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:56,393 INFO L225 Difference]: With dead ends: 155 [2023-12-25 22:59:56,393 INFO L226 Difference]: Without dead ends: 118 [2023-12-25 22:59:56,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-12-25 22:59:56,394 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 227 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:56,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 323 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 22:59:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-25 22:59:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2023-12-25 22:59:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2023-12-25 22:59:56,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 23 [2023-12-25 22:59:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:56,404 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2023-12-25 22:59:56,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2023-12-25 22:59:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2023-12-25 22:59:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-25 22:59:56,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:56,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:56,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-25 22:59:56,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:56,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -551494896, now seen corresponding path program 1 times [2023-12-25 22:59:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:56,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484671087] [2023-12-25 22:59:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:56,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484671087] [2023-12-25 22:59:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484671087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:56,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:56,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-25 22:59:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487097635] [2023-12-25 22:59:56,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:56,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-25 22:59:56,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-25 22:59:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-25 22:59:56,498 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:56,557 INFO L93 Difference]: Finished difference Result 129 states and 180 transitions. [2023-12-25 22:59:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-25 22:59:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-25 22:59:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:56,558 INFO L225 Difference]: With dead ends: 129 [2023-12-25 22:59:56,558 INFO L226 Difference]: Without dead ends: 85 [2023-12-25 22:59:56,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-25 22:59:56,559 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:56,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 151 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 22:59:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-25 22:59:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2023-12-25 22:59:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 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) [2023-12-25 22:59:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2023-12-25 22:59:56,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 23 [2023-12-25 22:59:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:56,563 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2023-12-25 22:59:56,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2023-12-25 22:59:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-25 22:59:56,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:56,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:56,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-25 22:59:56,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:56,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash 861254026, now seen corresponding path program 1 times [2023-12-25 22:59:56,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:56,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346183186] [2023-12-25 22:59:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346183186] [2023-12-25 22:59:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346183186] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:56,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 22:59:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-25 22:59:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53977540] [2023-12-25 22:59:56,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-25 22:59:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-25 22:59:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-25 22:59:56,647 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:56,677 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2023-12-25 22:59:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-25 22:59:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-25 22:59:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:56,678 INFO L225 Difference]: With dead ends: 115 [2023-12-25 22:59:56,678 INFO L226 Difference]: Without dead ends: 71 [2023-12-25 22:59:56,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-25 22:59:56,678 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:56,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 133 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 22:59:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-25 22:59:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2023-12-25 22:59:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 57 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) [2023-12-25 22:59:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2023-12-25 22:59:56,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 24 [2023-12-25 22:59:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:56,682 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2023-12-25 22:59:56,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2023-12-25 22:59:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-25 22:59:56,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:56,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:56,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-25 22:59:56,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:56,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 711684316, now seen corresponding path program 1 times [2023-12-25 22:59:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048992626] [2023-12-25 22:59:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:56,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048992626] [2023-12-25 22:59:56,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048992626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 22:59:56,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963800566] [2023-12-25 22:59:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:56,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 22:59:56,909 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) [2023-12-25 22:59:56,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-25 22:59:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:57,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-25 22:59:57,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 22:59:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:57,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 22:59:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-25 22:59:57,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963800566] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-25 22:59:57,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-25 22:59:57,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 13] total 21 [2023-12-25 22:59:57,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417261224] [2023-12-25 22:59:57,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:57,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-25 22:59:57,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-25 22:59:57,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-12-25 22:59:57,452 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-12-25 22:59:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:57,534 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2023-12-25 22:59:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-25 22:59:57,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) Word has length 39 [2023-12-25 22:59:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:57,535 INFO L225 Difference]: With dead ends: 138 [2023-12-25 22:59:57,535 INFO L226 Difference]: Without dead ends: 94 [2023-12-25 22:59:57,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-12-25 22:59:57,536 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 102 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:57,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 154 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-25 22:59:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-25 22:59:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2023-12-25 22:59:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 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) [2023-12-25 22:59:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2023-12-25 22:59:57,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 39 [2023-12-25 22:59:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:57,540 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2023-12-25 22:59:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-12-25 22:59:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2023-12-25 22:59:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-25 22:59:57,541 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:57,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:57,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-25 22:59:57,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:57,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:57,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1365103934, now seen corresponding path program 1 times [2023-12-25 22:59:57,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:57,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015590163] [2023-12-25 22:59:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:57,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015590163] [2023-12-25 22:59:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015590163] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 22:59:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233756919] [2023-12-25 22:59:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 22:59:57,922 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) [2023-12-25 22:59:57,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-25 22:59:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:58,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-25 22:59:58,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 22:59:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:58,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-25 22:59:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233756919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 22:59:58,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-25 22:59:58,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-25 22:59:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577254918] [2023-12-25 22:59:58,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 22:59:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-25 22:59:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-25 22:59:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-25 22:59:58,198 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:58,282 INFO L93 Difference]: Finished difference Result 117 states and 157 transitions. [2023-12-25 22:59:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-25 22:59:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-25 22:59:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:58,284 INFO L225 Difference]: With dead ends: 117 [2023-12-25 22:59:58,284 INFO L226 Difference]: Without dead ends: 72 [2023-12-25 22:59:58,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-25 22:59:58,285 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:58,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 76 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 22:59:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-25 22:59:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2023-12-25 22:59:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-12-25 22:59:58,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 40 [2023-12-25 22:59:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:58,289 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-12-25 22:59:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-12-25 22:59:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-25 22:59:58,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:58,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:58,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-25 22:59:58,495 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,SelfDestructingSolverStorable8 [2023-12-25 22:59:58,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:58,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2010832250, now seen corresponding path program 1 times [2023-12-25 22:59:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019493181] [2023-12-25 22:59:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:58,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019493181] [2023-12-25 22:59:58,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019493181] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 22:59:58,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980323814] [2023-12-25 22:59:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:58,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 22:59:58,858 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) [2023-12-25 22:59:58,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-25 22:59:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:58,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-25 22:59:58,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 22:59:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:59,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 22:59:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:59,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980323814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 22:59:59,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-25 22:59:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 22 [2023-12-25 22:59:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887248875] [2023-12-25 22:59:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-25 22:59:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-25 22:59:59,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 22:59:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-25 22:59:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-12-25 22:59:59,325 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 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) [2023-12-25 22:59:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 22:59:59,499 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2023-12-25 22:59:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-25 22:59:59,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 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) Word has length 41 [2023-12-25 22:59:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 22:59:59,500 INFO L225 Difference]: With dead ends: 105 [2023-12-25 22:59:59,500 INFO L226 Difference]: Without dead ends: 60 [2023-12-25 22:59:59,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2023-12-25 22:59:59,501 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 22:59:59,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 116 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 22:59:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-25 22:59:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-12-25 22:59:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 22:59:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-12-25 22:59:59,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 41 [2023-12-25 22:59:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 22:59:59,504 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-12-25 22:59:59,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 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) [2023-12-25 22:59:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-12-25 22:59:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-25 22:59:59,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 22:59:59,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 22:59:59,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-25 22:59:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:59,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 22:59:59,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 22:59:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -652608170, now seen corresponding path program 1 times [2023-12-25 22:59:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-25 22:59:59,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624680735] [2023-12-25 22:59:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:59,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-25 22:59:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 22:59:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 22:59:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-25 22:59:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624680735] [2023-12-25 22:59:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624680735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 22:59:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446771344] [2023-12-25 22:59:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 22:59:59,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 22:59:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 22:59:59,975 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) [2023-12-25 23:00:00,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-25 23:00:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 23:00:00,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-25 23:00:00,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 23:00:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 23:00:00,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 23:00:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 23:00:00,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446771344] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 23:00:00,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-25 23:00:00,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 22 [2023-12-25 23:00:00,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904559297] [2023-12-25 23:00:00,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-25 23:00:00,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-25 23:00:00,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-25 23:00:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-25 23:00:00,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-12-25 23:00:00,427 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 23:00:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 23:00:00,645 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-12-25 23:00:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-25 23:00:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-25 23:00:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 23:00:00,646 INFO L225 Difference]: With dead ends: 77 [2023-12-25 23:00:00,646 INFO L226 Difference]: Without dead ends: 0 [2023-12-25 23:00:00,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2023-12-25 23:00:00,647 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-25 23:00:00,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 143 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-25 23:00:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-25 23:00:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-25 23:00:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 23:00:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-25 23:00:00,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2023-12-25 23:00:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 23:00:00,648 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-25 23:00:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 23:00:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-25 23:00:00,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-25 23:00:00,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-25 23:00:00,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-25 23:00:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-25 23:00:00,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L126-2(line 126) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L126-4(line 126) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L119(line 119) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L119-2(line 119) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L119-4(line 119) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L111(line 111) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L111-2(line 111) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L111-4(line 111) no Hoare annotation was computed. [2023-12-25 23:00:00,931 INFO L899 garLoopResultBuilder]: For program point L21(line 21) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L21-3(line 21) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L71(line 71) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L71-2(line 71) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L71-4(line 71) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L72-2(line 72) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L899 garLoopResultBuilder]: For program point L72-4(line 72) no Hoare annotation was computed. [2023-12-25 23:00:00,932 INFO L895 garLoopResultBuilder]: At program point L81-2(lines 81 156) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~var_12~0#1| 1)) (.cse1 (= |ULTIMATE.start_main_~state_8~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~state_15~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~var_22~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1)) (.cse5 (= |ULTIMATE.start_main_~var_7~0#1| 0))) (or (and .cse0 (= |ULTIMATE.start_main_~state_26~0#1| 0) .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 (not (= (mod |ULTIMATE.start_main_~var_14~0#1| 256) 0)) (= |ULTIMATE.start_main_~next_74_arg_1~0#1| 0) .cse1 .cse2 .cse3 .cse4 .cse5 (= |ULTIMATE.start_main_~next_76_arg_1~0#1| 0)))) [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L81-3(lines 81 156) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L73(line 73) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L73-2(line 73) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L73-4(line 73) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L131(line 131) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L131-2(line 131) no Hoare annotation was computed. [2023-12-25 23:00:00,933 INFO L899 garLoopResultBuilder]: For program point L131-4(line 131) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point L132-2(line 132) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point L132-4(line 132) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point L150(line 150) no Hoare annotation was computed. [2023-12-25 23:00:00,934 INFO L899 garLoopResultBuilder]: For program point L150-2(line 150) no Hoare annotation was computed. [2023-12-25 23:00:00,935 INFO L899 garLoopResultBuilder]: For program point L150-4(line 150) no Hoare annotation was computed. [2023-12-25 23:00:00,938 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 23:00:00,939 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-25 23:00:00,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.12 11:00:00 BoogieIcfgContainer [2023-12-25 23:00:00,950 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-25 23:00:00,950 INFO L158 Benchmark]: Toolchain (without parser) took 7656.10ms. Allocated memory was 175.1MB in the beginning and 320.9MB in the end (delta: 145.8MB). Free memory was 119.0MB in the beginning and 139.6MB in the end (delta: -20.5MB). Peak memory consumption was 126.0MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,951 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 175.1MB. Free memory was 129.3MB in the beginning and 129.2MB in the end (delta: 102.2kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-25 23:00:00,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.89ms. Allocated memory is still 175.1MB. Free memory was 119.0MB in the beginning and 105.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,951 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.45ms. Allocated memory is still 175.1MB. Free memory was 105.4MB in the beginning and 101.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,951 INFO L158 Benchmark]: Boogie Preprocessor took 74.10ms. Allocated memory is still 175.1MB. Free memory was 101.0MB in the beginning and 97.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,952 INFO L158 Benchmark]: RCFGBuilder took 357.11ms. Allocated memory is still 175.1MB. Free memory was 97.4MB in the beginning and 72.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,952 INFO L158 Benchmark]: TraceAbstraction took 6941.47ms. Allocated memory was 175.1MB in the beginning and 320.9MB in the end (delta: 145.8MB). Free memory was 71.6MB in the beginning and 139.6MB in the end (delta: -68.0MB). Peak memory consumption was 78.8MB. Max. memory is 8.0GB. [2023-12-25 23:00:00,953 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 175.1MB. Free memory was 129.3MB in the beginning and 129.2MB in the end (delta: 102.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.89ms. Allocated memory is still 175.1MB. Free memory was 119.0MB in the beginning and 105.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 70.45ms. Allocated memory is still 175.1MB. Free memory was 105.4MB in the beginning and 101.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 74.10ms. Allocated memory is still 175.1MB. Free memory was 101.0MB in the beginning and 97.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 357.11ms. Allocated memory is still 175.1MB. Free memory was 97.4MB in the beginning and 72.3MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 6941.47ms. Allocated memory was 175.1MB in the beginning and 320.9MB in the end (delta: 145.8MB). Free memory was 71.6MB in the beginning and 139.6MB in the end (delta: -68.0MB). Peak memory consumption was 78.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.9s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1379 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1379 mSDsluCounter, 1841 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1379 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1026 IncrementalHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 462 mSDtfsCounter, 1026 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 394 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 257 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 3 NumberOfFragments, 54 HoareAnnotationTreeSize, 1 FormulaSimplifications, 1763 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FormulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 477 NumberOfCodeBlocks, 477 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 580 ConstructedInterpolants, 0 QuantifiedInterpolants, 3012 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1070 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 110/140 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 81]: Loop Invariant Derived loop invariant: ((((((((var_12 == 1) && (state_26 == 0)) && (state_8 == 0)) && (state_15 == 0)) && (var_22 == 1)) && (mask_SORT_1 == 1)) && (var_7 == 0)) || (((((((((var_12 == 1) && !(((var_14 % 256) == 0))) && (next_74_arg_1 == 0)) && (state_8 == 0)) && (state_15 == 0)) && (var_22 == 1)) && (mask_SORT_1 == 1)) && (var_7 == 0)) && (next_76_arg_1 == 0))) RESULT: Ultimate proved your program to be correct! [2023-12-25 23:00:00,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...