/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 05:37:12,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 05:37:12,540 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 05:37:12,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 05:37:12,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 05:37:12,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 05:37:12,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 05:37:12,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 05:37:12,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 05:37:12,570 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 05:37:12,570 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 05:37:12,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 05:37:12,571 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 05:37:12,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 05:37:12,572 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 05:37:12,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 05:37:12,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 05:37:12,572 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 05:37:12,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 05:37:12,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 05:37:12,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 05:37:12,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 05:37:12,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 05:37:12,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 05:37:12,574 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 05:37:12,574 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 05:37:12,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 05:37:12,574 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 05:37:12,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 05:37:12,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 05:37:12,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 05:37:12,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 05:37:12,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 05:37:12,576 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 05:37:12,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 05:37:12,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 05:37:12,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 05:37:12,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 05:37:12,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 05:37:12,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 05:37:12,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 05:37:12,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 05:37:12,781 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 05:37:12,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2023-12-20 05:37:13,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 05:37:14,032 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 05:37:14,034 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2023-12-20 05:37:14,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd2bf2b9e/01d9fff2bfbe4701a873a9bac87dbe5e/FLAGee1df91db [2023-12-20 05:37:14,056 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd2bf2b9e/01d9fff2bfbe4701a873a9bac87dbe5e [2023-12-20 05:37:14,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 05:37:14,058 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 05:37:14,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 05:37:14,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 05:37:14,064 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 05:37:14,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,065 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d4ddd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14, skipping insertion in model container [2023-12-20 05:37:14,065 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 05:37:14,200 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/sorting_selectionsort_2_ground.i[823,836] [2023-12-20 05:37:14,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 05:37:14,238 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 05:37:14,246 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/sorting_selectionsort_2_ground.i[823,836] [2023-12-20 05:37:14,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 05:37:14,264 INFO L206 MainTranslator]: Completed translation [2023-12-20 05:37:14,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14 WrapperNode [2023-12-20 05:37:14,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 05:37:14,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 05:37:14,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 05:37:14,266 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 05:37:14,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,302 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-12-20 05:37:14,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 05:37:14,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 05:37:14,303 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 05:37:14,303 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 05:37:14,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,325 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-12-20 05:37:14,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 05:37:14,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 05:37:14,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 05:37:14,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 05:37:14,335 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (1/1) ... [2023-12-20 05:37:14,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 05:37:14,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:14,366 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 05:37:14,381 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 05:37:14,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 05:37:14,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 05:37:14,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 05:37:14,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 05:37:14,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 05:37:14,449 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 05:37:14,451 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 05:37:14,609 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 05:37:14,632 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 05:37:14,632 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-20 05:37:14,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 05:37:14 BoogieIcfgContainer [2023-12-20 05:37:14,632 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 05:37:14,634 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 05:37:14,634 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 05:37:14,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 05:37:14,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 05:37:14" (1/3) ... [2023-12-20 05:37:14,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e10b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 05:37:14, skipping insertion in model container [2023-12-20 05:37:14,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 05:37:14" (2/3) ... [2023-12-20 05:37:14,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e10b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 05:37:14, skipping insertion in model container [2023-12-20 05:37:14,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 05:37:14" (3/3) ... [2023-12-20 05:37:14,638 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-12-20 05:37:14,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 05:37:14,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 05:37:14,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 05:37:14,685 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;@6a778b5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 05:37:14,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 05:37:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:37:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 05:37:14,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:14,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:14,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:14,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2038256253, now seen corresponding path program 1 times [2023-12-20 05:37:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013590930] [2023-12-20 05:37:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:14,890 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 05:37:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013590930] [2023-12-20 05:37:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013590930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 05:37:14,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 05:37:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400795054] [2023-12-20 05:37:14,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 05:37:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 05:37:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 05:37:14,929 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:15,012 INFO L93 Difference]: Finished difference Result 81 states and 140 transitions. [2023-12-20 05:37:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 05:37:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-20 05:37:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:15,019 INFO L225 Difference]: With dead ends: 81 [2023-12-20 05:37:15,020 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 05:37:15,021 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 05:37:15,024 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:15,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 05:37:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 05:37:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-12-20 05:37:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:37:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-12-20 05:37:15,051 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 11 [2023-12-20 05:37:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-12-20 05:37:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-12-20 05:37:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 05:37:15,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:15,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 05:37:15,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:15,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash -891550513, now seen corresponding path program 1 times [2023-12-20 05:37:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:15,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022083791] [2023-12-20 05:37:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:15,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 05:37:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022083791] [2023-12-20 05:37:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022083791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:15,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020666312] [2023-12-20 05:37:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:15,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:15,118 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 05:37:15,158 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 05:37:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:15,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 05:37:15,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:15,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 05:37:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020666312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:15,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 05:37:15,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-20 05:37:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121158468] [2023-12-20 05:37:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 05:37:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 05:37:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:15,198 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:15,234 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2023-12-20 05:37:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 05:37:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-20 05:37:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:15,235 INFO L225 Difference]: With dead ends: 76 [2023-12-20 05:37:15,235 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 05:37:15,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:15,237 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 05:37:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-12-20 05:37:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 05:37:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2023-12-20 05:37:15,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 14 [2023-12-20 05:37:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:15,242 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2023-12-20 05:37:15,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2023-12-20 05:37:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-20 05:37:15,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:15,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:15,254 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 05:37:15,454 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 05:37:15,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:15,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash -82203887, now seen corresponding path program 1 times [2023-12-20 05:37:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37737682] [2023-12-20 05:37:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 05:37:15,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37737682] [2023-12-20 05:37:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37737682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714379713] [2023-12-20 05:37:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:15,529 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 05:37:15,542 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 05:37:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:15,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 05:37:15,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 05:37:15,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 05:37:15,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714379713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:15,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:15,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-20 05:37:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990207067] [2023-12-20 05:37:15,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:15,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 05:37:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 05:37:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-20 05:37:15,638 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:15,764 INFO L93 Difference]: Finished difference Result 134 states and 195 transitions. [2023-12-20 05:37:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 05:37:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-20 05:37:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:15,769 INFO L225 Difference]: With dead ends: 134 [2023-12-20 05:37:15,769 INFO L226 Difference]: Without dead ends: 100 [2023-12-20 05:37:15,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 05:37:15,772 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 112 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:15,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 93 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 05:37:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-20 05:37:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-20 05:37:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-20 05:37:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2023-12-20 05:37:15,783 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 14 [2023-12-20 05:37:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2023-12-20 05:37:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2023-12-20 05:37:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 05:37:15,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:15,788 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:15,793 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 05:37:15,995 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,SelfDestructingSolverStorable2 [2023-12-20 05:37:15,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:15,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -451950294, now seen corresponding path program 2 times [2023-12-20 05:37:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:15,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886609097] [2023-12-20 05:37:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 05:37:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:16,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886609097] [2023-12-20 05:37:16,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886609097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:16,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 05:37:16,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 05:37:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963494052] [2023-12-20 05:37:16,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:16,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 05:37:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 05:37:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 05:37:16,054 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:16,109 INFO L93 Difference]: Finished difference Result 189 states and 271 transitions. [2023-12-20 05:37:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 05:37:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-20 05:37:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:16,110 INFO L225 Difference]: With dead ends: 189 [2023-12-20 05:37:16,110 INFO L226 Difference]: Without dead ends: 104 [2023-12-20 05:37:16,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 05:37:16,111 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:16,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-20 05:37:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2023-12-20 05:37:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-20 05:37:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 144 transitions. [2023-12-20 05:37:16,120 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 144 transitions. Word has length 17 [2023-12-20 05:37:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:16,120 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 144 transitions. [2023-12-20 05:37:16,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 144 transitions. [2023-12-20 05:37:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 05:37:16,121 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:16,121 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:16,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 05:37:16,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:16,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264908, now seen corresponding path program 1 times [2023-12-20 05:37:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:16,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592907329] [2023-12-20 05:37:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 05:37:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:16,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592907329] [2023-12-20 05:37:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592907329] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677533453] [2023-12-20 05:37:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:16,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:16,203 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 05:37:16,217 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 05:37:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:16,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 05:37:16,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:16,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 05:37:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677533453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:16,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-12-20 05:37:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074773665] [2023-12-20 05:37:16,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 05:37:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 05:37:16,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2023-12-20 05:37:16,380 INFO L87 Difference]: Start difference. First operand 101 states and 144 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:16,615 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2023-12-20 05:37:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 05:37:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:37:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:16,617 INFO L225 Difference]: With dead ends: 335 [2023-12-20 05:37:16,617 INFO L226 Difference]: Without dead ends: 240 [2023-12-20 05:37:16,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2023-12-20 05:37:16,619 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 438 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:16,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 181 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 05:37:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-12-20 05:37:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 233. [2023-12-20 05:37:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 210 states have (on average 1.4047619047619047) internal successors, (295), 210 states have internal predecessors, (295), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-20 05:37:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 337 transitions. [2023-12-20 05:37:16,653 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 337 transitions. Word has length 20 [2023-12-20 05:37:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:16,654 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 337 transitions. [2023-12-20 05:37:16,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 337 transitions. [2023-12-20 05:37:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 05:37:16,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:16,655 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:16,662 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 05:37:16,859 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 05:37:16,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:16,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1080408568, now seen corresponding path program 2 times [2023-12-20 05:37:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140689029] [2023-12-20 05:37:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-20 05:37:16,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:16,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140689029] [2023-12-20 05:37:16,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140689029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:16,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 05:37:16,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 05:37:16,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767644011] [2023-12-20 05:37:16,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:16,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 05:37:16,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 05:37:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 05:37:16,970 INFO L87 Difference]: Start difference. First operand 233 states and 337 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:17,008 INFO L93 Difference]: Finished difference Result 433 states and 632 transitions. [2023-12-20 05:37:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 05:37:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-20 05:37:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:17,010 INFO L225 Difference]: With dead ends: 433 [2023-12-20 05:37:17,010 INFO L226 Difference]: Without dead ends: 229 [2023-12-20 05:37:17,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 05:37:17,012 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:17,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-12-20 05:37:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2023-12-20 05:37:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 207 states have (on average 1.4009661835748792) internal successors, (290), 207 states have internal predecessors, (290), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-20 05:37:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 330 transitions. [2023-12-20 05:37:17,040 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 330 transitions. Word has length 29 [2023-12-20 05:37:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:17,040 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 330 transitions. [2023-12-20 05:37:17,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 330 transitions. [2023-12-20 05:37:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 05:37:17,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:17,043 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:17,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 05:37:17,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:17,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash -614793971, now seen corresponding path program 1 times [2023-12-20 05:37:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:17,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716623597] [2023-12-20 05:37:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:17,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716623597] [2023-12-20 05:37:17,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716623597] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212180540] [2023-12-20 05:37:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:17,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:17,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:17,269 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 05:37:17,295 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 05:37:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:17,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 05:37:17,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:17,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212180540] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:17,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-20 05:37:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650996675] [2023-12-20 05:37:17,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 05:37:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 05:37:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-20 05:37:17,526 INFO L87 Difference]: Start difference. First operand 229 states and 330 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:17,920 INFO L93 Difference]: Finished difference Result 698 states and 1043 transitions. [2023-12-20 05:37:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 05:37:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-20 05:37:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:17,923 INFO L225 Difference]: With dead ends: 698 [2023-12-20 05:37:17,923 INFO L226 Difference]: Without dead ends: 481 [2023-12-20 05:37:17,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 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 05:37:17,924 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 846 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:17,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 298 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 05:37:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-12-20 05:37:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2023-12-20 05:37:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 435 states have (on average 1.4114942528735632) internal successors, (614), 435 states have internal predecessors, (614), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-20 05:37:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 702 transitions. [2023-12-20 05:37:17,940 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 702 transitions. Word has length 30 [2023-12-20 05:37:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:17,940 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 702 transitions. [2023-12-20 05:37:17,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 702 transitions. [2023-12-20 05:37:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 05:37:17,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:17,941 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:17,948 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 05:37:18,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:18,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 656879565, now seen corresponding path program 2 times [2023-12-20 05:37:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:18,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965279058] [2023-12-20 05:37:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:18,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965279058] [2023-12-20 05:37:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965279058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414384273] [2023-12-20 05:37:18,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 05:37:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:18,563 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 05:37:18,588 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 05:37:18,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 05:37:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:18,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 05:37:18,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:18,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:19,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414384273] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:19,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:19,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-20 05:37:19,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221063390] [2023-12-20 05:37:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:19,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 05:37:19,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 05:37:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 05:37:19,289 INFO L87 Difference]: Start difference. First operand 481 states and 702 transitions. Second operand has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:20,406 INFO L93 Difference]: Finished difference Result 1442 states and 2171 transitions. [2023-12-20 05:37:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-20 05:37:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-20 05:37:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:20,409 INFO L225 Difference]: With dead ends: 1442 [2023-12-20 05:37:20,409 INFO L226 Difference]: Without dead ends: 985 [2023-12-20 05:37:20,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 05:37:20,411 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2560 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:20,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 468 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 05:37:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-12-20 05:37:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 985. [2023-12-20 05:37:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 891 states have (on average 1.4163860830527497) internal successors, (1262), 891 states have internal predecessors, (1262), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-12-20 05:37:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1446 transitions. [2023-12-20 05:37:20,437 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1446 transitions. Word has length 42 [2023-12-20 05:37:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:20,437 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1446 transitions. [2023-12-20 05:37:20,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1446 transitions. [2023-12-20 05:37:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 05:37:20,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:20,439 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:20,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-20 05:37:20,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:20,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:20,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash -712166067, now seen corresponding path program 3 times [2023-12-20 05:37:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:20,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232289788] [2023-12-20 05:37:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:20,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232289788] [2023-12-20 05:37:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232289788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790862128] [2023-12-20 05:37:21,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 05:37:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:21,974 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 05:37:22,000 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 05:37:22,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 05:37:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:22,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 05:37:22,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2023-12-20 05:37:22,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 05:37:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790862128] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 05:37:22,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 05:37:22,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [48] total 53 [2023-12-20 05:37:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483865387] [2023-12-20 05:37:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 05:37:22,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 05:37:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 05:37:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2023-12-20 05:37:22,108 INFO L87 Difference]: Start difference. First operand 985 states and 1446 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:22,178 INFO L93 Difference]: Finished difference Result 1920 states and 2841 transitions. [2023-12-20 05:37:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 05:37:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-12-20 05:37:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:22,183 INFO L225 Difference]: With dead ends: 1920 [2023-12-20 05:37:22,183 INFO L226 Difference]: Without dead ends: 999 [2023-12-20 05:37:22,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 05:37:22,186 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:22,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 05:37:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-12-20 05:37:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 987. [2023-12-20 05:37:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 893 states have (on average 1.4165733482642777) internal successors, (1265), 893 states have internal predecessors, (1265), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-12-20 05:37:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1449 transitions. [2023-12-20 05:37:22,210 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1449 transitions. Word has length 66 [2023-12-20 05:37:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:22,210 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 1449 transitions. [2023-12-20 05:37:22,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1449 transitions. [2023-12-20 05:37:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-20 05:37:22,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:22,211 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:22,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 05:37:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:22,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:22,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1392224437, now seen corresponding path program 1 times [2023-12-20 05:37:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527598211] [2023-12-20 05:37:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527598211] [2023-12-20 05:37:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527598211] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911382302] [2023-12-20 05:37:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:23,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:23,815 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 05:37:23,856 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 05:37:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:23,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-20 05:37:23,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:24,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911382302] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:26,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:26,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-12-20 05:37:26,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826807722] [2023-12-20 05:37:26,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-20 05:37:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-20 05:37:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-12-20 05:37:26,405 INFO L87 Difference]: Start difference. First operand 987 states and 1449 transitions. Second operand has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:37:31,982 INFO L93 Difference]: Finished difference Result 2934 states and 4433 transitions. [2023-12-20 05:37:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-20 05:37:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-12-20 05:37:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:37:31,988 INFO L225 Difference]: With dead ends: 2934 [2023-12-20 05:37:31,988 INFO L226 Difference]: Without dead ends: 1995 [2023-12-20 05:37:31,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-12-20 05:37:31,991 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6952 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7139 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 05:37:31,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7139 Valid, 895 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 05:37:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2023-12-20 05:37:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1995. [2023-12-20 05:37:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1805 states have (on average 1.418836565096953) internal successors, (2561), 1805 states have internal predecessors, (2561), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2023-12-20 05:37:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2937 transitions. [2023-12-20 05:37:32,042 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2937 transitions. Word has length 66 [2023-12-20 05:37:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:37:32,042 INFO L495 AbstractCegarLoop]: Abstraction has 1995 states and 2937 transitions. [2023-12-20 05:37:32,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:37:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2937 transitions. [2023-12-20 05:37:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-20 05:37:32,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:37:32,043 INFO L195 NwaCegarLoop]: trace histogram [94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:37:32,052 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 05:37:32,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:32,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:37:32,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:37:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1840848309, now seen corresponding path program 2 times [2023-12-20 05:37:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:37:32,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768210482] [2023-12-20 05:37:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:37:32,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:37:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:37:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:37:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768210482] [2023-12-20 05:37:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768210482] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:37:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635147988] [2023-12-20 05:37:36,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 05:37:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:37:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:37:36,321 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 05:37:36,321 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 05:37:36,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 05:37:36,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:37:36,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-20 05:37:36,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:37:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:36,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:37:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:37:43,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635147988] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:37:43,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:37:43,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2023-12-20 05:37:43,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786415006] [2023-12-20 05:37:43,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:37:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-12-20 05:37:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:37:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-12-20 05:37:43,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-12-20 05:37:43,821 INFO L87 Difference]: Start difference. First operand 1995 states and 2937 transitions. Second operand has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:38:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:38:48,313 INFO L93 Difference]: Finished difference Result 5910 states and 8945 transitions. [2023-12-20 05:38:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-20 05:38:48,314 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-20 05:38:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:38:48,325 INFO L225 Difference]: With dead ends: 5910 [2023-12-20 05:38:48,325 INFO L226 Difference]: Without dead ends: 4011 [2023-12-20 05:38:48,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-12-20 05:38:48,329 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16446 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16825 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 05:38:48,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16825 Valid, 1609 Invalid, 4626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1309 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 05:38:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2023-12-20 05:38:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 4011. [2023-12-20 05:38:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 3629 states have (on average 1.4199503995591072) internal successors, (5153), 3629 states have internal predecessors, (5153), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2023-12-20 05:38:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 5913 transitions. [2023-12-20 05:38:48,404 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 5913 transitions. Word has length 114 [2023-12-20 05:38:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:38:48,404 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 5913 transitions. [2023-12-20 05:38:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:38:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 5913 transitions. [2023-12-20 05:38:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-12-20 05:38:48,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:38:48,406 INFO L195 NwaCegarLoop]: trace histogram [190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:38:48,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-20 05:38:48,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 05:38:48,611 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:38:48,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:38:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1465518005, now seen corresponding path program 3 times [2023-12-20 05:38:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:38:48,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934218123] [2023-12-20 05:38:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:38:48,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:38:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:39:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 05:39:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:39:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934218123] [2023-12-20 05:39:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934218123] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:39:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981157664] [2023-12-20 05:39:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 05:39:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:39:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:39:02,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 05:39:02,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 05:39:02,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 05:39:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:39:02,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-20 05:39:02,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:39:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2023-12-20 05:39:02,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:39:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2023-12-20 05:39:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981157664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:39:03,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:39:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 6, 6] total 201 [2023-12-20 05:39:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782462301] [2023-12-20 05:39:03,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:39:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2023-12-20 05:39:03,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:39:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2023-12-20 05:39:03,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18942, Invalid=21258, Unknown=0, NotChecked=0, Total=40200 [2023-12-20 05:39:03,111 INFO L87 Difference]: Start difference. First operand 4011 states and 5913 transitions. Second operand has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:42:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 05:42:21,481 INFO L93 Difference]: Finished difference Result 10233 states and 15630 transitions. [2023-12-20 05:42:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2023-12-20 05:42:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2023-12-20 05:42:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 05:42:21,500 INFO L225 Difference]: With dead ends: 10233 [2023-12-20 05:42:21,500 INFO L226 Difference]: Without dead ends: 6414 [2023-12-20 05:42:21,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171373 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=192074, Invalid=420232, Unknown=0, NotChecked=0, Total=612306 [2023-12-20 05:42:21,553 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 28670 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 4161 mSolverCounterSat, 1447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29053 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1447 IncrementalHoareTripleChecker+Valid, 4161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-20 05:42:21,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29053 Valid, 1211 Invalid, 5608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1447 Valid, 4161 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-20 05:42:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2023-12-20 05:42:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6386. [2023-12-20 05:42:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6000 states have (on average 1.3545) internal successors, (8127), 6000 states have internal predecessors, (8127), 384 states have call successors, (384), 1 states have call predecessors, (384), 1 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-12-20 05:42:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 8895 transitions. [2023-12-20 05:42:21,767 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 8895 transitions. Word has length 210 [2023-12-20 05:42:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 05:42:21,768 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 8895 transitions. [2023-12-20 05:42:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 05:42:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 8895 transitions. [2023-12-20 05:42:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-20 05:42:21,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 05:42:21,771 INFO L195 NwaCegarLoop]: trace histogram [192, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 05:42:21,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 05:42:21,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:42:21,996 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 05:42:21,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 05:42:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash -969816469, now seen corresponding path program 4 times [2023-12-20 05:42:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 05:42:21,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636821797] [2023-12-20 05:42:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 05:42:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 05:42:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 05:42:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 05:42:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 05:42:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636821797] [2023-12-20 05:42:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636821797] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 05:42:36,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987866854] [2023-12-20 05:42:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 05:42:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 05:42:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 05:42:36,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 05:42:36,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 05:42:36,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 05:42:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 05:42:36,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 194 conjunts are in the unsatisfiable core [2023-12-20 05:42:36,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 05:42:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 05:42:36,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 05:42:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 05:42:58,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987866854] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 05:42:58,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 05:42:58,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 388 [2023-12-20 05:42:58,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739684505] [2023-12-20 05:42:58,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 05:42:58,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2023-12-20 05:42:58,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 05:42:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2023-12-20 05:42:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75466, Invalid=75466, Unknown=0, NotChecked=0, Total=150932 [2023-12-20 05:42:58,372 INFO L87 Difference]: Start difference. First operand 6386 states and 8895 transitions. Second operand has 389 states, 389 states have (on average 1.038560411311054) internal successors, (404), 388 states have internal predecessors, (404), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-20 05:51:40,704 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 05:51:40,705 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 05:51:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 388 states. [2023-12-20 05:51:40,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=75466, Invalid=75466, Unknown=0, NotChecked=0, Total=150932 [2023-12-20 05:51:40,741 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22514 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 1336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22515 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 05:51:40,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22515 Valid, 1477 Invalid, 3496 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1336 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 05:51:40,742 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 05:51:40,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-20 05:51:40,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 05:51:40,949 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (6386states) and FLOYD_HOARE automaton (currently 388 states, 389 states before enhancement),while ReachableStatesComputation was computing reachable states (11324 states constructed, input type IntersectNwa). [2023-12-20 05:51:40,960 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 1, 1] [2023-12-20 05:51:40,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 05:51:40,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 05:51:40 BoogieIcfgContainer [2023-12-20 05:51:40,963 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 05:51:40,963 INFO L158 Benchmark]: Toolchain (without parser) took 866904.79ms. Allocated memory was 254.8MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 209.2MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.6GB. Max. memory is 8.0GB. [2023-12-20 05:51:40,963 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 183.5MB. Free memory is still 130.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 05:51:40,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.56ms. Allocated memory is still 254.8MB. Free memory was 209.2MB in the beginning and 197.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 05:51:40,963 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.81ms. Allocated memory is still 254.8MB. Free memory was 197.7MB in the beginning and 195.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 05:51:40,964 INFO L158 Benchmark]: Boogie Preprocessor took 31.27ms. Allocated memory is still 254.8MB. Free memory was 195.6MB in the beginning and 193.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 05:51:40,964 INFO L158 Benchmark]: RCFGBuilder took 297.62ms. Allocated memory is still 254.8MB. Free memory was 193.5MB in the beginning and 179.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-20 05:51:40,964 INFO L158 Benchmark]: TraceAbstraction took 866329.03ms. Allocated memory was 254.8MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 178.8MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2023-12-20 05:51:40,965 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 183.5MB. Free memory is still 130.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.56ms. Allocated memory is still 254.8MB. Free memory was 209.2MB in the beginning and 197.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.81ms. Allocated memory is still 254.8MB. Free memory was 197.7MB in the beginning and 195.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.27ms. Allocated memory is still 254.8MB. Free memory was 195.6MB in the beginning and 193.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 297.62ms. Allocated memory is still 254.8MB. Free memory was 193.5MB in the beginning and 179.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 866329.03ms. Allocated memory was 254.8MB in the beginning and 2.0GB in the end (delta: 1.7GB). Free memory was 178.8MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (6386states) and FLOYD_HOARE automaton (currently 388 states, 389 states before enhancement),while ReachableStatesComputation was computing reachable states (11324 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 866.3s, OverallIterations: 13, TraceHistogramMax: 192, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 793.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 79763 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 78643 mSDsluCounter, 6527 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6168 mSDsCounter, 4978 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13121 IncrementalHoareTripleChecker+Invalid, 18099 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4978 mSolverCounterUnsat, 359 mSDtfsCounter, 13121 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2725 GetRequests, 1119 SyntacticMatches, 0 SemanticMatches, 1606 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173259 ImplicationChecksByTransitivity, 105.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6386occurred in iteration=12, InterpolantAutomatonStates: 1178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 76 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 68.0s InterpolantComputationTime, 1657 NumberOfCodeBlocks, 1424 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 2346 ConstructedInterpolants, 0 QuantifiedInterpolants, 5186 SizeOfPredicates, 4 NumberOfNonLiveVariables, 4199 ConjunctsInSsa, 395 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 37682/130089 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown