/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 06:36:40,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 06:36:40,483 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 06:36:40,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 06:36:40,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 06:36:40,500 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 06:36:40,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 06:36:40,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 06:36:40,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 06:36:40,501 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 06:36:40,502 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 06:36:40,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 06:36:40,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 06:36:40,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 06:36:40,503 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 06:36:40,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 06:36:40,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 06:36:40,503 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 06:36:40,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 06:36:40,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 06:36:40,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 06:36:40,504 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 06:36:40,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 06:36:40,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 06:36:40,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 06:36:40,505 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 06:36:40,505 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 06:36:40,506 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 06:36:40,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 06:36:40,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 06:36:40,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 06:36:40,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 06:36:40,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 06:36:40,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 06:36:40,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 06:36:40,507 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 06:36:40,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 06:36:40,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 06:36:40,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 06:36:40,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 06:36:40,508 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 06:36:40,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 06:36:40,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 06:36:40,509 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 06:36:40,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 06:36:40,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 06:36:40,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 06:36:40,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 06:36:40,713 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 06:36:40,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2023-12-20 06:36:41,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 06:36:41,953 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 06:36:41,954 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2023-12-20 06:36:41,958 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52342eac2/0759093516114dadbde876f7ca09a7a9/FLAG1b71617ea [2023-12-20 06:36:41,968 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52342eac2/0759093516114dadbde876f7ca09a7a9 [2023-12-20 06:36:41,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 06:36:41,971 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 06:36:41,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 06:36:41,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 06:36:41,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 06:36:41,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 06:36:41" (1/1) ... [2023-12-20 06:36:41,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c843fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:41, skipping insertion in model container [2023-12-20 06:36:41,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 06:36:41" (1/1) ... [2023-12-20 06:36:41,989 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 06:36:42,078 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i[811,824] [2023-12-20 06:36:42,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 06:36:42,098 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 06:36:42,108 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i[811,824] [2023-12-20 06:36:42,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 06:36:42,130 INFO L206 MainTranslator]: Completed translation [2023-12-20 06:36:42,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42 WrapperNode [2023-12-20 06:36:42,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 06:36:42,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 06:36:42,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 06:36:42,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 06:36:42,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,163 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-12-20 06:36:42,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 06:36:42,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 06:36:42,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 06:36:42,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 06:36:42,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,180 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,197 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2023-12-20 06:36:42,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,214 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 06:36:42,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 06:36:42,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 06:36:42,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 06:36:42,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (1/1) ... [2023-12-20 06:36:42,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 06:36:42,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:42,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 06:36:42,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 06:36:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 06:36:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 06:36:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 06:36:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 06:36:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 06:36:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 06:36:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 06:36:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 06:36:42,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 06:36:42,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 06:36:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 06:36:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 06:36:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 06:36:42,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 06:36:42,325 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 06:36:42,326 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 06:36:42,500 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 06:36:42,524 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 06:36:42,524 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 06:36:42,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 06:36:42 BoogieIcfgContainer [2023-12-20 06:36:42,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 06:36:42,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 06:36:42,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 06:36:42,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 06:36:42,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 06:36:41" (1/3) ... [2023-12-20 06:36:42,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e29235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 06:36:42, skipping insertion in model container [2023-12-20 06:36:42,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 06:36:42" (2/3) ... [2023-12-20 06:36:42,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e29235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 06:36:42, skipping insertion in model container [2023-12-20 06:36:42,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 06:36:42" (3/3) ... [2023-12-20 06:36:42,530 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2023-12-20 06:36:42,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 06:36:42,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 06:36:42,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 06:36:42,575 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;@5271c51b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 06:36:42,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 06:36:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-20 06:36:42,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:42,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:42,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:42,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash -572000217, now seen corresponding path program 1 times [2023-12-20 06:36:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:42,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859687349] [2023-12-20 06:36:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 06:36:42,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:42,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859687349] [2023-12-20 06:36:42,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859687349] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 06:36:42,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 06:36:42,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 06:36:42,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899182123] [2023-12-20 06:36:42,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 06:36:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 06:36:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 06:36:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 06:36:42,818 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:42,889 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2023-12-20 06:36:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 06:36:42,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-12-20 06:36:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:42,897 INFO L225 Difference]: With dead ends: 49 [2023-12-20 06:36:42,897 INFO L226 Difference]: Without dead ends: 29 [2023-12-20 06:36:42,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 06:36:42,904 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:42,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-20 06:36:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2023-12-20 06:36:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-12-20 06:36:42,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 9 [2023-12-20 06:36:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:42,931 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-12-20 06:36:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-12-20 06:36:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 06:36:42,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:42,932 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] [2023-12-20 06:36:42,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 06:36:42,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 137950365, now seen corresponding path program 1 times [2023-12-20 06:36:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:42,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730419493] [2023-12-20 06:36:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:42,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730419493] [2023-12-20 06:36:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730419493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729338770] [2023-12-20 06:36:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:43,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:43,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:43,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 06:36:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:43,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 06:36:43,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:43,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 06:36:43,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729338770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:43,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-20 06:36:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128795358] [2023-12-20 06:36:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 06:36:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 06:36:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 06:36:43,194 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:43,269 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2023-12-20 06:36:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 06:36:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 06:36:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:43,270 INFO L225 Difference]: With dead ends: 72 [2023-12-20 06:36:43,270 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 06:36:43,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 06:36:43,271 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:43,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 47 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 06:36:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-20 06:36:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2023-12-20 06:36:43,277 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 20 [2023-12-20 06:36:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:43,277 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2023-12-20 06:36:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2023-12-20 06:36:43,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 06:36:43,278 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:43,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:43,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:43,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash 935035248, now seen corresponding path program 2 times [2023-12-20 06:36:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218172888] [2023-12-20 06:36:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-20 06:36:43,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218172888] [2023-12-20 06:36:43,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218172888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 06:36:43,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 06:36:43,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 06:36:43,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58428401] [2023-12-20 06:36:43,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 06:36:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 06:36:43,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 06:36:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 06:36:43,767 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:43,823 INFO L93 Difference]: Finished difference Result 106 states and 157 transitions. [2023-12-20 06:36:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 06:36:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-20 06:36:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:43,824 INFO L225 Difference]: With dead ends: 106 [2023-12-20 06:36:43,824 INFO L226 Difference]: Without dead ends: 78 [2023-12-20 06:36:43,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 06:36:43,827 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:43,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 06:36:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-20 06:36:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2023-12-20 06:36:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2023-12-20 06:36:43,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 53 [2023-12-20 06:36:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:43,835 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2023-12-20 06:36:43,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2023-12-20 06:36:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 06:36:43,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:43,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 06:36:43,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:43,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:43,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2106781328, now seen corresponding path program 1 times [2023-12-20 06:36:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:43,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727079187] [2023-12-20 06:36:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:43,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:43,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727079187] [2023-12-20 06:36:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727079187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:43,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062270000] [2023-12-20 06:36:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:43,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:44,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 06:36:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:44,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 06:36:44,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:44,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-20 06:36:44,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062270000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:44,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:44,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-20 06:36:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295143708] [2023-12-20 06:36:44,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 06:36:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 06:36:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-20 06:36:44,179 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:44,313 INFO L93 Difference]: Finished difference Result 224 states and 329 transitions. [2023-12-20 06:36:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 06:36:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 53 [2023-12-20 06:36:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:44,314 INFO L225 Difference]: With dead ends: 224 [2023-12-20 06:36:44,314 INFO L226 Difference]: Without dead ends: 160 [2023-12-20 06:36:44,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-20 06:36:44,315 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 208 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:44,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 89 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 06:36:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-20 06:36:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-12-20 06:36:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3962264150943395) internal successors, (222), 159 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2023-12-20 06:36:44,324 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 53 [2023-12-20 06:36:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2023-12-20 06:36:44,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2023-12-20 06:36:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-20 06:36:44,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:44,327 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:44,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:44,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-20 06:36:44,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:44,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:44,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1885477296, now seen corresponding path program 2 times [2023-12-20 06:36:44,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:44,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833472666] [2023-12-20 06:36:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833472666] [2023-12-20 06:36:44,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833472666] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:44,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495917888] [2023-12-20 06:36:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 06:36:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:44,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:44,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 06:36:44,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 06:36:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:36:44,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 06:36:44,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:44,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-12-20 06:36:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495917888] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:45,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:45,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-20 06:36:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344053362] [2023-12-20 06:36:45,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:45,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 06:36:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 06:36:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 06:36:45,120 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:45,396 INFO L93 Difference]: Finished difference Result 488 states and 719 transitions. [2023-12-20 06:36:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 06:36:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-12-20 06:36:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:45,398 INFO L225 Difference]: With dead ends: 488 [2023-12-20 06:36:45,398 INFO L226 Difference]: Without dead ends: 340 [2023-12-20 06:36:45,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 06:36:45,399 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 806 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 155 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 06:36:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-12-20 06:36:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2023-12-20 06:36:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3982300884955752) internal successors, (474), 339 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 474 transitions. [2023-12-20 06:36:45,412 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 474 transitions. Word has length 119 [2023-12-20 06:36:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:45,412 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 474 transitions. [2023-12-20 06:36:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 474 transitions. [2023-12-20 06:36:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-12-20 06:36:45,415 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:45,415 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:45,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:45,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:45,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:45,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1998407664, now seen corresponding path program 3 times [2023-12-20 06:36:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:45,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477094787] [2023-12-20 06:36:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:45,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2023-12-20 06:36:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477094787] [2023-12-20 06:36:46,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477094787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:46,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979356921] [2023-12-20 06:36:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 06:36:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:46,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:46,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 06:36:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 06:36:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:36:46,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 06:36:46,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:46,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 06:36:47,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:36:47,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2023-12-20 06:36:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2023-12-20 06:36:47,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:47,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-20 06:36:47,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-20 06:36:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2395 trivial. 0 not checked. [2023-12-20 06:36:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979356921] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:47,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:47,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9, 9] total 37 [2023-12-20 06:36:47,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352116491] [2023-12-20 06:36:47,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-20 06:36:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-20 06:36:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 06:36:47,500 INFO L87 Difference]: Start difference. First operand 340 states and 474 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:49,387 INFO L93 Difference]: Finished difference Result 1056 states and 1506 transitions. [2023-12-20 06:36:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-12-20 06:36:49,387 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 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 251 [2023-12-20 06:36:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:49,390 INFO L225 Difference]: With dead ends: 1056 [2023-12-20 06:36:49,390 INFO L226 Difference]: Without dead ends: 740 [2023-12-20 06:36:49,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 486 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3676, Invalid=8534, Unknown=0, NotChecked=0, Total=12210 [2023-12-20 06:36:49,394 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2673 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2673 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:49,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2673 Valid, 219 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 06:36:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2023-12-20 06:36:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 664. [2023-12-20 06:36:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.4223227752639518) internal successors, (943), 663 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 943 transitions. [2023-12-20 06:36:49,410 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 943 transitions. Word has length 251 [2023-12-20 06:36:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:49,410 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 943 transitions. [2023-12-20 06:36:49,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 943 transitions. [2023-12-20 06:36:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-12-20 06:36:49,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:49,414 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:49,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:49,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:49,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:49,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1075608353, now seen corresponding path program 1 times [2023-12-20 06:36:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:49,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860299191] [2023-12-20 06:36:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860299191] [2023-12-20 06:36:50,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860299191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031110381] [2023-12-20 06:36:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:50,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:50,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:50,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:50,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 06:36:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:50,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 06:36:50,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:50,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-12-20 06:36:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031110381] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:51,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:51,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2023-12-20 06:36:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678029918] [2023-12-20 06:36:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:51,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-20 06:36:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-20 06:36:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 06:36:51,463 INFO L87 Difference]: Start difference. First operand 664 states and 943 transitions. Second operand has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:36:52,508 INFO L93 Difference]: Finished difference Result 2337 states and 3326 transitions. [2023-12-20 06:36:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-20 06:36:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2023-12-20 06:36:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:36:52,513 INFO L225 Difference]: With dead ends: 2337 [2023-12-20 06:36:52,513 INFO L226 Difference]: Without dead ends: 1700 [2023-12-20 06:36:52,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 06:36:52,515 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2340 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2340 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 06:36:52,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2340 Valid, 332 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 06:36:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2023-12-20 06:36:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1366. [2023-12-20 06:36:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.4227106227106228) internal successors, (1942), 1365 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1942 transitions. [2023-12-20 06:36:52,552 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1942 transitions. Word has length 284 [2023-12-20 06:36:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:36:52,553 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1942 transitions. [2023-12-20 06:36:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:36:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1942 transitions. [2023-12-20 06:36:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-12-20 06:36:52,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:36:52,563 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:36:52,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 06:36:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:52,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:36:52,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:36:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -317933966, now seen corresponding path program 2 times [2023-12-20 06:36:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:36:52,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349946475] [2023-12-20 06:36:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:36:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:36:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:36:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:36:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:36:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349946475] [2023-12-20 06:36:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349946475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:36:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401316721] [2023-12-20 06:36:55,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 06:36:55,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:36:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:36:55,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:36:55,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 06:36:56,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 06:36:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:36:56,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 06:36:56,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:36:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:36:56,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:36:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14742 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-12-20 06:36:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401316721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:36:59,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:36:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2023-12-20 06:36:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895240240] [2023-12-20 06:36:59,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:36:59,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-12-20 06:36:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:36:59,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-12-20 06:36:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 06:36:59,134 INFO L87 Difference]: Start difference. First operand 1366 states and 1942 transitions. Second operand has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:37:05,009 INFO L93 Difference]: Finished difference Result 4740 states and 6755 transitions. [2023-12-20 06:37:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-12-20 06:37:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 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 581 [2023-12-20 06:37:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:37:05,017 INFO L225 Difference]: With dead ends: 4740 [2023-12-20 06:37:05,017 INFO L226 Difference]: Without dead ends: 3428 [2023-12-20 06:37:05,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 06:37:05,020 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6708 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 1143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6708 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1143 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 06:37:05,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6708 Valid, 656 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1143 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 06:37:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2023-12-20 06:37:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2770. [2023-12-20 06:37:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 1.4228963524738172) internal successors, (3940), 2769 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3940 transitions. [2023-12-20 06:37:05,096 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3940 transitions. Word has length 581 [2023-12-20 06:37:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:37:05,098 INFO L495 AbstractCegarLoop]: Abstraction has 2770 states and 3940 transitions. [2023-12-20 06:37:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 108 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:37:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3940 transitions. [2023-12-20 06:37:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2023-12-20 06:37:05,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:37:05,136 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:37:05,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-20 06:37:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:37:05,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:37:05,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:37:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -770846126, now seen corresponding path program 3 times [2023-12-20 06:37:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:37:05,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364604838] [2023-12-20 06:37:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:37:05,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:37:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:37:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2023-12-20 06:37:16,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:37:16,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364604838] [2023-12-20 06:37:16,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364604838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:37:16,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787150136] [2023-12-20 06:37:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 06:37:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:37:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:37:16,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:37:16,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 06:37:17,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 06:37:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:37:17,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 06:37:17,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:37:17,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 06:37:17,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-12-20 06:37:19,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:37:19,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2023-12-20 06:37:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 524 proven. 1362 refuted. 0 times theorem prover too weak. 59647 trivial. 0 not checked. [2023-12-20 06:37:19,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:37:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61533 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 59647 trivial. 0 not checked. [2023-12-20 06:37:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787150136] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:37:21,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:37:21,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 13, 12] total 128 [2023-12-20 06:37:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626168569] [2023-12-20 06:37:21,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:37:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-12-20 06:37:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:37:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-12-20 06:37:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7257, Invalid=8999, Unknown=0, NotChecked=0, Total=16256 [2023-12-20 06:37:21,738 INFO L87 Difference]: Start difference. First operand 2770 states and 3940 transitions. Second operand has 128 states, 128 states have (on average 1.421875) internal successors, (182), 128 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:38:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 06:38:48,392 INFO L93 Difference]: Finished difference Result 8806 states and 12541 transitions. [2023-12-20 06:38:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 786 states. [2023-12-20 06:38:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.421875) internal successors, (182), 128 states have internal predecessors, (182), 0 states have call successors, (0), 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 1175 [2023-12-20 06:38:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 06:38:48,407 INFO L225 Difference]: With dead ends: 8806 [2023-12-20 06:38:48,408 INFO L226 Difference]: Without dead ends: 6144 [2023-12-20 06:38:48,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3234 GetRequests, 2436 SyntacticMatches, 3 SemanticMatches, 795 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237654 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=121919, Invalid=512493, Unknown=0, NotChecked=0, Total=634412 [2023-12-20 06:38:48,448 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19792 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 4043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19792 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 5349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4043 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-20 06:38:48,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19792 Valid, 761 Invalid, 5349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4043 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-20 06:38:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6144 states. [2023-12-20 06:38:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6144 to 5310. [2023-12-20 06:38:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 1.437182143529855) internal successors, (7630), 5309 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:38:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 7630 transitions. [2023-12-20 06:38:48,556 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 7630 transitions. Word has length 1175 [2023-12-20 06:38:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 06:38:48,557 INFO L495 AbstractCegarLoop]: Abstraction has 5310 states and 7630 transitions. [2023-12-20 06:38:48,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.421875) internal successors, (182), 128 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 06:38:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 7630 transitions. [2023-12-20 06:38:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1220 [2023-12-20 06:38:48,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 06:38:48,573 INFO L195 NwaCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 06:38:48,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 06:38:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:38:48,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 06:38:48,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 06:38:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1755821744, now seen corresponding path program 4 times [2023-12-20 06:38:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 06:38:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707436595] [2023-12-20 06:38:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 06:38:48,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 06:38:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 06:39:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 60170 trivial. 0 not checked. [2023-12-20 06:39:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 06:39:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707436595] [2023-12-20 06:39:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707436595] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 06:39:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307337683] [2023-12-20 06:39:01,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 06:39:01,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 06:39:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 06:39:01,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 06:39:01,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 06:39:01,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 06:39:01,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 06:39:01,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 454 conjunts are in the unsatisfiable core [2023-12-20 06:39:02,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 06:39:04,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 06:39:04,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-20 06:39:05,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:39:05,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 06:39:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 2040 proven. 58113 refuted. 0 times theorem prover too weak. 6122 trivial. 0 not checked. [2023-12-20 06:39:17,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 06:39:36,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-12-20 06:39:36,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 06:39:36,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2023-12-20 06:39:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 66275 backedges. 546 proven. 59624 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2023-12-20 06:39:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307337683] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 06:39:54,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 06:39:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 224, 228] total 560 [2023-12-20 06:39:54,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117480969] [2023-12-20 06:39:54,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 06:39:54,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 560 states [2023-12-20 06:39:54,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 06:39:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 560 interpolants. [2023-12-20 06:39:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27527, Invalid=285513, Unknown=0, NotChecked=0, Total=313040 [2023-12-20 06:39:54,361 INFO L87 Difference]: Start difference. First operand 5310 states and 7630 transitions. Second operand has 560 states, 560 states have (on average 4.1375) internal successors, (2317), 560 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)