/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 16:18:33,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 16:18:33,660 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 16:18:33,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 16:18:33,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 16:18:33,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 16:18:33,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 16:18:33,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 16:18:33,687 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 16:18:33,690 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 16:18:33,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 16:18:33,691 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 16:18:33,691 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 16:18:33,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 16:18:33,692 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 16:18:33,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 16:18:33,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 16:18:33,693 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 16:18:33,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 16:18:33,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 16:18:33,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 16:18:33,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 16:18:33,694 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 16:18:33,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 16:18:33,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 16:18:33,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:33,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 16:18:33,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 16:18:33,697 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 16:18:33,697 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 16:18:33,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 16:18:33,697 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 16:18:33,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 16:18:33,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 16:18:33,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 16:18:33,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 16:18:33,903 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 16:18:33,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2023-12-18 16:18:34,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 16:18:34,972 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 16:18:34,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2023-12-18 16:18:34,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cbbb42e1/409174cd40e94834959e81a2ad236c97/FLAGac4601914 [2023-12-18 16:18:34,985 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cbbb42e1/409174cd40e94834959e81a2ad236c97 [2023-12-18 16:18:34,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 16:18:34,988 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 16:18:34,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:34,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 16:18:34,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 16:18:34,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:34" (1/1) ... [2023-12-18 16:18:34,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3138d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:34, skipping insertion in model container [2023-12-18 16:18:34,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:34" (1/1) ... [2023-12-18 16:18:35,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 16:18:35,097 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_ground-1.i[823,836] [2023-12-18 16:18:35,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,117 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 16:18:35,125 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_ground-1.i[823,836] [2023-12-18 16:18:35,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,145 INFO L206 MainTranslator]: Completed translation [2023-12-18 16:18:35,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35 WrapperNode [2023-12-18 16:18:35,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:35,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 16:18:35,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 16:18:35,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,168 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2023-12-18 16:18:35,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 16:18:35,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 16:18:35,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,177 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,185 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]. [2023-12-18 16:18:35,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 16:18:35,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 16:18:35,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 16:18:35,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:35,216 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) [2023-12-18 16:18:35,218 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 [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 16:18:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 16:18:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 16:18:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 16:18:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 16:18:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 16:18:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-18 16:18:35,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-18 16:18:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 16:18:35,300 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 16:18:35,302 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 16:18:35,426 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 16:18:35,449 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 16:18:35,449 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-18 16:18:35,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:35 BoogieIcfgContainer [2023-12-18 16:18:35,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 16:18:35,451 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 16:18:35,451 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 16:18:35,454 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 16:18:35,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 04:18:34" (1/3) ... [2023-12-18 16:18:35,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387d4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (2/3) ... [2023-12-18 16:18:35,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387d4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:35" (3/3) ... [2023-12-18 16:18:35,455 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2023-12-18 16:18:35,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 16:18:35,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 16:18:35,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 16:18:35,500 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;@3cdd3fde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 16:18:35,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 16:18:35,503 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) [2023-12-18 16:18:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 16:18:35,507 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:35,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:35,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:35,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2038256253, now seen corresponding path program 1 times [2023-12-18 16:18:35,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:35,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625773162] [2023-12-18 16:18:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:35,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625773162] [2023-12-18 16:18:35,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625773162] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:35,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:35,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 16:18:35,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337975724] [2023-12-18 16:18:35,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:35,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:35,723 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) [2023-12-18 16:18:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:35,801 INFO L93 Difference]: Finished difference Result 65 states and 108 transitions. [2023-12-18 16:18:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:35,803 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 [2023-12-18 16:18:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:35,810 INFO L225 Difference]: With dead ends: 65 [2023-12-18 16:18:35,810 INFO L226 Difference]: Without dead ends: 32 [2023-12-18 16:18:35,813 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 [2023-12-18 16:18:35,816 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-18 16:18:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-18 16:18:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 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) [2023-12-18 16:18:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-12-18 16:18:35,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 11 [2023-12-18 16:18:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:35,842 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-12-18 16:18:35,843 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) [2023-12-18 16:18:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-12-18 16:18:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 16:18:35,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:35,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:35,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 16:18:35,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:35,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash -929420434, now seen corresponding path program 1 times [2023-12-18 16:18:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:35,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982388252] [2023-12-18 16:18:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982388252] [2023-12-18 16:18:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982388252] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:35,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356094010] [2023-12-18 16:18:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:35,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:35,935 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) [2023-12-18 16:18:35,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 16:18:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:35,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-18 16:18:35,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:36,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356094010] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:36,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-18 16:18:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654026394] [2023-12-18 16:18:36,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:36,019 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-18 16:18:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,063 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-12-18 16:18:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2023-12-18 16:18:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,065 INFO L225 Difference]: With dead ends: 60 [2023-12-18 16:18:36,065 INFO L226 Difference]: Without dead ends: 48 [2023-12-18 16:18:36,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 16:18:36,067 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-18 16:18:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-12-18 16:18:36,077 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) [2023-12-18 16:18:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-12-18 16:18:36,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2023-12-18 16:18:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,079 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-12-18 16:18:36,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-12-18 16:18:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-12-18 16:18:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 16:18:36,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:36,285 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 [2023-12-18 16:18:36,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -891550513, now seen corresponding path program 1 times [2023-12-18 16:18:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984228111] [2023-12-18 16:18:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984228111] [2023-12-18 16:18:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984228111] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729605695] [2023-12-18 16:18:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:36,344 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) [2023-12-18 16:18:36,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 16:18:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 16:18:36,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729605695] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:36,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:36,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-18 16:18:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827338032] [2023-12-18 16:18:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 16:18:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 16:18:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 16:18:36,431 INFO L87 Difference]: Start difference. First operand 33 states and 44 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) [2023-12-18 16:18:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,450 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-12-18 16:18:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 16:18:36,451 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 [2023-12-18 16:18:36,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,451 INFO L225 Difference]: With dead ends: 66 [2023-12-18 16:18:36,451 INFO L226 Difference]: Without dead ends: 36 [2023-12-18 16:18:36,452 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 [2023-12-18 16:18:36,452 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-18 16:18:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-18 16:18:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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) [2023-12-18 16:18:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-12-18 16:18:36,456 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 14 [2023-12-18 16:18:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,456 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-12-18 16:18:36,457 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) [2023-12-18 16:18:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-12-18 16:18:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 16:18:36,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,457 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:36,660 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 [2023-12-18 16:18:36,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1261296920, now seen corresponding path program 2 times [2023-12-18 16:18:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210581029] [2023-12-18 16:18:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 16:18:36,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210581029] [2023-12-18 16:18:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210581029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:36,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 16:18:36,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638038131] [2023-12-18 16:18:36,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 16:18:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 16:18:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 16:18:36,729 INFO L87 Difference]: Start difference. First operand 36 states and 47 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) [2023-12-18 16:18:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,792 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2023-12-18 16:18:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 16:18:36,792 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 [2023-12-18 16:18:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,793 INFO L225 Difference]: With dead ends: 82 [2023-12-18 16:18:36,793 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 16:18:36,793 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 [2023-12-18 16:18:36,794 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 16:18:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2023-12-18 16:18:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2023-12-18 16:18:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-12-18 16:18:36,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 17 [2023-12-18 16:18:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,798 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-12-18 16:18:36,798 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) [2023-12-18 16:18:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-12-18 16:18:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 16:18:36,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,799 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-18 16:18:36,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264908, now seen corresponding path program 1 times [2023-12-18 16:18:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284865585] [2023-12-18 16:18:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-18 16:18:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284865585] [2023-12-18 16:18:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284865585] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:36,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 16:18:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735711367] [2023-12-18 16:18:36,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 16:18:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 16:18:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 16:18:36,896 INFO L87 Difference]: Start difference. First operand 37 states and 48 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) [2023-12-18 16:18:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,946 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2023-12-18 16:18:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 16:18:36,946 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 20 [2023-12-18 16:18:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,947 INFO L225 Difference]: With dead ends: 79 [2023-12-18 16:18:36,947 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 16:18:36,947 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 [2023-12-18 16:18:36,948 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 16:18:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-12-18 16:18:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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) [2023-12-18 16:18:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-12-18 16:18:36,952 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 20 [2023-12-18 16:18:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,953 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-12-18 16:18:36,953 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) [2023-12-18 16:18:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-12-18 16:18:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 16:18:36,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,953 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-18 16:18:36,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,954 INFO L85 PathProgramCache]: Analyzing trace with hash -821471327, now seen corresponding path program 1 times [2023-12-18 16:18:36,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568757103] [2023-12-18 16:18:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568757103] [2023-12-18 16:18:37,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568757103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143276447] [2023-12-18 16:18:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,060 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) [2023-12-18 16:18:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 16:18:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143276447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:37,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:37,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-18 16:18:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412173625] [2023-12-18 16:18:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 16:18:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 16:18:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 16:18:37,184 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2023-12-18 16:18:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,208 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2023-12-18 16:18:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 16:18:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 21 [2023-12-18 16:18:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,209 INFO L225 Difference]: With dead ends: 90 [2023-12-18 16:18:37,209 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 16:18:37,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 16:18:37,210 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 16:18:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-18 16:18:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 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) [2023-12-18 16:18:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-12-18 16:18:37,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 21 [2023-12-18 16:18:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,216 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-12-18 16:18:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2023-12-18 16:18:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-12-18 16:18:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 16:18:37,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,216 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:37,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:37,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:37,423 INFO L85 PathProgramCache]: Analyzing trace with hash 844164673, now seen corresponding path program 2 times [2023-12-18 16:18:37,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:37,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183580220] [2023-12-18 16:18:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183580220] [2023-12-18 16:18:37,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183580220] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863063593] [2023-12-18 16:18:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:37,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,560 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) [2023-12-18 16:18:37,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 16:18:37,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-18 16:18:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:37,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:37,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-18 16:18:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-18 16:18:37,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 16:18:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863063593] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:37,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:18:37,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2023-12-18 16:18:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445727742] [2023-12-18 16:18:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 16:18:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 16:18:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-18 16:18:37,753 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-12-18 16:18:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,858 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-12-18 16:18:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 16:18:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 27 [2023-12-18 16:18:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,859 INFO L225 Difference]: With dead ends: 63 [2023-12-18 16:18:37,859 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 16:18:37,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-12-18 16:18:37,859 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 127 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 16:18:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2023-12-18 16:18:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 50 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-12-18 16:18:37,870 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 27 [2023-12-18 16:18:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,870 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-12-18 16:18:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-12-18 16:18:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-12-18 16:18:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 16:18:37,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,871 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:38,075 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 [2023-12-18 16:18:38,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:38,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 925196036, now seen corresponding path program 1 times [2023-12-18 16:18:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430200112] [2023-12-18 16:18:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-18 16:18:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:38,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:38,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430200112] [2023-12-18 16:18:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430200112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:38,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501706448] [2023-12-18 16:18:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:38,241 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) [2023-12-18 16:18:38,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 16:18:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 16:18:38,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:38,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:38,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501706448] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:38,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-12-18 16:18:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846392301] [2023-12-18 16:18:38,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:38,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 16:18:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 16:18:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 16:18:38,551 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:38,592 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2023-12-18 16:18:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 16:18:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-12-18 16:18:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:38,594 INFO L225 Difference]: With dead ends: 112 [2023-12-18 16:18:38,594 INFO L226 Difference]: Without dead ends: 68 [2023-12-18 16:18:38,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 16:18:38,609 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:38,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-18 16:18:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-18 16:18:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 62 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2023-12-18 16:18:38,627 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 34 [2023-12-18 16:18:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:38,627 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2023-12-18 16:18:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2023-12-18 16:18:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 16:18:38,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:38,632 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:38,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:38,837 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 [2023-12-18 16:18:38,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:38,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:38,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2011549244, now seen corresponding path program 2 times [2023-12-18 16:18:38,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:38,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114787221] [2023-12-18 16:18:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-18 16:18:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:39,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114787221] [2023-12-18 16:18:39,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114787221] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251233058] [2023-12-18 16:18:39,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:39,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:39,190 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) [2023-12-18 16:18:39,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 16:18:39,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:39,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:39,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 16:18:39,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:39,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:39,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251233058] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:39,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:39,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2023-12-18 16:18:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453422848] [2023-12-18 16:18:39,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 16:18:39,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 16:18:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 16:18:39,836 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:39,885 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2023-12-18 16:18:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 16:18:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-12-18 16:18:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:39,886 INFO L225 Difference]: With dead ends: 136 [2023-12-18 16:18:39,886 INFO L226 Difference]: Without dead ends: 92 [2023-12-18 16:18:39,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 16:18:39,888 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:39,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-18 16:18:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-12-18 16:18:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 86 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2023-12-18 16:18:39,894 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 46 [2023-12-18 16:18:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:39,894 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2023-12-18 16:18:39,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2023-12-18 16:18:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-18 16:18:39,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:39,895 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:39,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:40,099 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 [2023-12-18 16:18:40,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:40,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash -519997628, now seen corresponding path program 3 times [2023-12-18 16:18:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:40,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901548577] [2023-12-18 16:18:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:40,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-12-18 16:18:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1081 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901548577] [2023-12-18 16:18:41,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901548577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657506364] [2023-12-18 16:18:41,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:18:41,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:41,429 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) [2023-12-18 16:18:41,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 16:18:41,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 16:18:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:41,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 16:18:41,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2023-12-18 16:18:41,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2023-12-18 16:18:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657506364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:41,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:41,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2023-12-18 16:18:41,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007284232] [2023-12-18 16:18:41,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:41,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-18 16:18:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-18 16:18:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 16:18:41,618 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:41,745 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2023-12-18 16:18:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-18 16:18:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2023-12-18 16:18:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:41,746 INFO L225 Difference]: With dead ends: 161 [2023-12-18 16:18:41,746 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 16:18:41,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-12-18 16:18:41,748 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 247 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 16:18:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2023-12-18 16:18:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-12-18 16:18:41,754 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 70 [2023-12-18 16:18:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:41,754 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-12-18 16:18:41,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 51 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-12-18 16:18:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-18 16:18:41,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:41,755 INFO L195 NwaCegarLoop]: trace histogram [47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:41,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:41,960 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 [2023-12-18 16:18:41,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:41,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash 274341311, now seen corresponding path program 1 times [2023-12-18 16:18:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:41,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442212939] [2023-12-18 16:18:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-18 16:18:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442212939] [2023-12-18 16:18:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442212939] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739131553] [2023-12-18 16:18:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:43,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:43,418 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) [2023-12-18 16:18:43,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 16:18:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-18 16:18:43,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:43,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 2 proven. 1128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:45,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739131553] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:45,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:45,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 99 [2023-12-18 16:18:45,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841248790] [2023-12-18 16:18:45,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:45,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-12-18 16:18:45,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-12-18 16:18:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-12-18 16:18:45,782 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:45,876 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2023-12-18 16:18:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-18 16:18:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-12-18 16:18:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:45,877 INFO L225 Difference]: With dead ends: 202 [2023-12-18 16:18:45,877 INFO L226 Difference]: Without dead ends: 150 [2023-12-18 16:18:45,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-12-18 16:18:45,880 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:45,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-18 16:18:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-12-18 16:18:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 143 states have (on average 1.118881118881119) internal successors, (160), 144 states have internal predecessors, (160), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2023-12-18 16:18:45,888 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 71 [2023-12-18 16:18:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:45,888 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2023-12-18 16:18:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2023-12-18 16:18:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-18 16:18:45,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:45,889 INFO L195 NwaCegarLoop]: trace histogram [96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:45,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:46,093 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 [2023-12-18 16:18:46,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:46,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash -614969946, now seen corresponding path program 2 times [2023-12-18 16:18:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:46,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584154785] [2023-12-18 16:18:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:50,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-12-18 16:18:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584154785] [2023-12-18 16:18:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584154785] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247562755] [2023-12-18 16:18:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:50,379 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) [2023-12-18 16:18:50,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 16:18:50,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:50,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-18 16:18:50,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:50,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4661 backedges. 2 proven. 4656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:18:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247562755] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:58,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:58,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 99] total 197 [2023-12-18 16:18:58,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566549] [2023-12-18 16:18:58,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:58,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-12-18 16:18:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-12-18 16:18:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-12-18 16:18:58,859 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:59,102 INFO L93 Difference]: Finished difference Result 300 states and 433 transitions. [2023-12-18 16:18:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-12-18 16:18:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-12-18 16:18:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:59,104 INFO L225 Difference]: With dead ends: 300 [2023-12-18 16:18:59,104 INFO L226 Difference]: Without dead ends: 248 [2023-12-18 16:18:59,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-12-18 16:18:59,106 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:59,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-12-18 16:18:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-12-18 16:18:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.070539419087137) internal successors, (258), 242 states have internal predecessors, (258), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 16:18:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 266 transitions. [2023-12-18 16:18:59,118 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 266 transitions. Word has length 120 [2023-12-18 16:18:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:59,119 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 266 transitions. [2023-12-18 16:18:59,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 197 states have internal predecessors, (218), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:18:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 266 transitions. [2023-12-18 16:18:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-18 16:18:59,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:59,120 INFO L195 NwaCegarLoop]: trace histogram [194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:59,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:59,325 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 [2023-12-18 16:18:59,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:59,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash -546200890, now seen corresponding path program 3 times [2023-12-18 16:18:59,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:59,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745960865] [2023-12-18 16:18:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:59,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-12-18 16:19:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 18915 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 16:19:14,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745960865] [2023-12-18 16:19:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745960865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109615277] [2023-12-18 16:19:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:19:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:14,958 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) [2023-12-18 16:19:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 16:19:15,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 16:19:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:15,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 16:19:15,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18919 trivial. 0 not checked. [2023-12-18 16:19:15,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18920 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 18917 trivial. 0 not checked. [2023-12-18 16:19:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109615277] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:15,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2023-12-18 16:19:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42536758] [2023-12-18 16:19:15,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-18 16:19:15,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-18 16:19:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2023-12-18 16:19:15,622 INFO L87 Difference]: Start difference. First operand 248 states and 266 transitions. Second operand has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:19:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:19:28,373 INFO L93 Difference]: Finished difference Result 348 states and 412 transitions. [2023-12-18 16:19:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-12-18 16:19:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-12-18 16:19:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:19:28,374 INFO L225 Difference]: With dead ends: 348 [2023-12-18 16:19:28,374 INFO L226 Difference]: Without dead ends: 296 [2023-12-18 16:19:28,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2023-12-18 16:19:28,383 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 487 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 16:19:28,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 264 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 16:19:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-12-18 16:19:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 277. [2023-12-18 16:19:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.0892193308550187) internal successors, (293), 270 states have internal predecessors, (293), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 16:19:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 303 transitions. [2023-12-18 16:19:28,396 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 303 transitions. Word has length 218 [2023-12-18 16:19:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:19:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 303 transitions. [2023-12-18 16:19:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 203 states have internal predecessors, (231), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:19:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 303 transitions. [2023-12-18 16:19:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-12-18 16:19:28,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:19:28,398 INFO L195 NwaCegarLoop]: trace histogram [195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:19:28,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 16:19:28,602 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 [2023-12-18 16:19:28,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:28,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -21559199, now seen corresponding path program 4 times [2023-12-18 16:19:28,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:28,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275037553] [2023-12-18 16:19:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:44,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-12-18 16:19:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 16:19:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275037553] [2023-12-18 16:19:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275037553] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721082565] [2023-12-18 16:19:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:19:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:44,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 16:19:44,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 16:19:44,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:19:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:44,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 197 conjunts are in the unsatisfiable core [2023-12-18 16:19:44,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-18 16:19:44,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:20:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19136 backedges. 2 proven. 19110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 16:20:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721082565] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:20:17,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:20:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 197, 198] total 395 [2023-12-18 16:20:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664189948] [2023-12-18 16:20:17,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:20:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-12-18 16:20:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:20:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-12-18 16:20:17,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-12-18 16:20:17,627 INFO L87 Difference]: Start difference. First operand 277 states and 303 transitions. Second operand has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:20:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:20:18,901 INFO L93 Difference]: Finished difference Result 554 states and 802 transitions. [2023-12-18 16:20:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-12-18 16:20:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 228 [2023-12-18 16:20:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:20:18,903 INFO L225 Difference]: With dead ends: 554 [2023-12-18 16:20:18,903 INFO L226 Difference]: Without dead ends: 474 [2023-12-18 16:20:18,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-12-18 16:20:18,939 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 16:20:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 16:20:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-12-18 16:20:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2023-12-18 16:20:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 466 states have (on average 1.0515021459227467) internal successors, (490), 467 states have internal predecessors, (490), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 16:20:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 500 transitions. [2023-12-18 16:20:18,960 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 500 transitions. Word has length 228 [2023-12-18 16:20:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:20:18,960 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 500 transitions. [2023-12-18 16:20:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-18 16:20:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 500 transitions. [2023-12-18 16:20:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-12-18 16:20:18,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:20:18,964 INFO L195 NwaCegarLoop]: trace histogram [392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:20:18,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 16:20:19,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 16:20:19,172 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:20:19,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:20:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -482330982, now seen corresponding path program 5 times [2023-12-18 16:20:19,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:20:19,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243958143] [2023-12-18 16:20:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:20:19,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:20:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:21:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2023-12-18 16:21:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:21:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 77054 backedges. 2 proven. 77028 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-18 16:21:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:21:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243958143] [2023-12-18 16:21:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243958143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:21:26,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106944734] [2023-12-18 16:21:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 16:21:26,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:21:26,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:21:26,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 16:21:26,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 16:32:54,677 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 16:32:54,677 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 [2023-12-18 16:32:55,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-18 16:32:55,878 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forcibly destroying the process [2023-12-18 16:32:55,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 137 [2023-12-18 16:32:55,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 16:32:55,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 16:32:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [395] total 395 [2023-12-18 16:32:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375905348] [2023-12-18 16:32:55,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 16:32:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-12-18 16:32:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:32:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-12-18 16:32:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-12-18 16:32:55,911 INFO L87 Difference]: Start difference. First operand 474 states and 500 transitions. Second operand has 395 states, 395 states have (on average 1.0430379746835443) internal successors, (412), 395 states have internal predecessors, (412), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-18 16:32:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 16:32:55,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-12-18 16:32:55,919 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:32:55,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:32:55,921 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 16:32:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-18 16:32:55,922 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (474states) and FLOYD_HOARE automaton (currently 2 states, 395 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 16:32:55,925 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 1, 1, 1] [2023-12-18 16:32:55,930 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 16:32:55,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 04:32:55 BoogieIcfgContainer [2023-12-18 16:32:55,932 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 16:32:55,932 INFO L158 Benchmark]: Toolchain (without parser) took 860944.57ms. Allocated memory was 240.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 199.1MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 163.2MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,933 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory was 141.4MB in the beginning and 141.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 16:32:55,933 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.74ms. Allocated memory is still 240.1MB. Free memory was 199.1MB in the beginning and 187.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,933 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.52ms. Allocated memory is still 240.1MB. Free memory was 187.5MB in the beginning and 185.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,934 INFO L158 Benchmark]: Boogie Preprocessor took 25.90ms. Allocated memory is still 240.1MB. Free memory was 185.8MB in the beginning and 183.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,934 INFO L158 Benchmark]: RCFGBuilder took 254.61ms. Allocated memory is still 240.1MB. Free memory was 183.4MB in the beginning and 169.1MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,935 INFO L158 Benchmark]: TraceAbstraction took 860480.75ms. Allocated memory was 240.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 168.4MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 132.8MB. Max. memory is 8.0GB. [2023-12-18 16:32:55,935 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory was 141.4MB in the beginning and 141.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 156.74ms. Allocated memory is still 240.1MB. Free memory was 199.1MB in the beginning and 187.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.52ms. Allocated memory is still 240.1MB. Free memory was 187.5MB in the beginning and 185.8MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.90ms. Allocated memory is still 240.1MB. Free memory was 185.8MB in the beginning and 183.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 254.61ms. Allocated memory is still 240.1MB. Free memory was 183.4MB in the beginning and 169.1MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 860480.75ms. Allocated memory was 240.1MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 168.4MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 132.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 (474states) and FLOYD_HOARE automaton (currently 2 states, 395 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 860.4s, OverallIterations: 15, TraceHistogramMax: 392, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 15.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 643 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 628 mSDsluCounter, 2274 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1815 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1853 IncrementalHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 459 mSDtfsCounter, 1853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2937 GetRequests, 1292 SyntacticMatches, 2 SemanticMatches, 1643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23217 ImplicationChecksByTransitivity, 125.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=474occurred in iteration=14, InterpolantAutomatonStates: 1057, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 78 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 150.2s InterpolantComputationTime, 2195 NumberOfCodeBlocks, 1946 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2982 ConstructedInterpolants, 0 QuantifiedInterpolants, 6755 SizeOfPredicates, 8 NumberOfNonLiveVariables, 4348 ConjunctsInSsa, 412 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 40264/212987 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