/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-fpi/s3if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:34:04,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:34:04,280 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 21:34:04,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:34:04,286 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:34:04,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:34:04,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:34:04,313 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:34:04,314 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:34:04,317 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:34:04,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:34:04,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:34:04,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:34:04,320 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:34:04,320 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:34:04,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:34:04,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:34:04,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:34:04,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:34:04,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:34:04,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:34:04,323 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:34:04,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:34:04,323 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:34:04,323 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:34:04,323 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:34:04,324 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:34:04,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:34:04,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:34:04,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:34:04,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:34:04,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:34:04,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:34:04,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:34:04,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:34:04,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:34:04,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:34:04,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:34:04,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:34:04,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:34:04,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:34:04,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:34:04,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:34:04,568 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:34:04,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3if.c [2023-12-18 21:34:05,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:34:05,940 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:34:05,940 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3if.c [2023-12-18 21:34:05,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f43cadfa/036be4da0f5a4df4bdb2bc42c79ab4ed/FLAG7098a69d3 [2023-12-18 21:34:05,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f43cadfa/036be4da0f5a4df4bdb2bc42c79ab4ed [2023-12-18 21:34:05,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:34:05,962 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:34:05,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:34:05,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:34:05,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:34:05,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:34:05" (1/1) ... [2023-12-18 21:34:05,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7f583b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:05, skipping insertion in model container [2023-12-18 21:34:05,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:34:05" (1/1) ... [2023-12-18 21:34:05,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:34:06,131 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-fpi/s3if.c[587,600] [2023-12-18 21:34:06,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:34:06,153 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:34:06,165 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-fpi/s3if.c[587,600] [2023-12-18 21:34:06,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:34:06,188 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:34:06,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06 WrapperNode [2023-12-18 21:34:06,189 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:34:06,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:34:06,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:34:06,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:34:06,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,236 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-12-18 21:34:06,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:34:06,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:34:06,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:34:06,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:34:06,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,269 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 6, 4]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 3, 1]. [2023-12-18 21:34:06,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,287 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:34:06,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:34:06,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:34:06,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:34:06,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (1/1) ... [2023-12-18 21:34:06,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:34:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:06,317 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 21:34:06,336 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 21:34:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:34:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:34:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:34:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:34:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:34:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 21:34:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:34:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:34:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:34:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:34:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:34:06,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 21:34:06,442 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:34:06,445 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:34:06,616 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:34:06,635 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:34:06,636 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:34:06,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:34:06 BoogieIcfgContainer [2023-12-18 21:34:06,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:34:06,638 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:34:06,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:34:06,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:34:06,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:34:05" (1/3) ... [2023-12-18 21:34:06,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a43e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:34:06, skipping insertion in model container [2023-12-18 21:34:06,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:34:06" (2/3) ... [2023-12-18 21:34:06,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a43e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:34:06, skipping insertion in model container [2023-12-18 21:34:06,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:34:06" (3/3) ... [2023-12-18 21:34:06,645 INFO L112 eAbstractionObserver]: Analyzing ICFG s3if.c [2023-12-18 21:34:06,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:34:06,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:34:06,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:34:06,713 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;@660b9dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:34:06,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:34:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:34:06,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:06,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:06,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:06,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -278767546, now seen corresponding path program 1 times [2023-12-18 21:34:06,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:06,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406020833] [2023-12-18 21:34:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:06,879 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 21:34:06,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:06,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406020833] [2023-12-18 21:34:06,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406020833] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:34:06,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:34:06,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:34:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429187331] [2023-12-18 21:34:06,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:34:06,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:34:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:34:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:34:06,908 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:06,934 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-12-18 21:34:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:34:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-18 21:34:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:06,943 INFO L225 Difference]: With dead ends: 29 [2023-12-18 21:34:06,943 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 21:34:06,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:34:06,952 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:06,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 21:34:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 21:34:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 21:34:06,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-12-18 21:34:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:06,980 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 21:34:06,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 21:34:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:34:06,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:06,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:34:06,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:06,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1088114172, now seen corresponding path program 1 times [2023-12-18 21:34:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:06,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875000213] [2023-12-18 21:34:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:06,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:07,157 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 21:34:07,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875000213] [2023-12-18 21:34:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875000213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:34:07,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:34:07,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:34:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546916526] [2023-12-18 21:34:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:34:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:34:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:34:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:34:07,161 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:07,192 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-12-18 21:34:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:34:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-18 21:34:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:07,193 INFO L225 Difference]: With dead ends: 25 [2023-12-18 21:34:07,193 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 21:34:07,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:34:07,195 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:07,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 21:34:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-12-18 21:34:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-18 21:34:07,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-12-18 21:34:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:07,202 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-18 21:34:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-18 21:34:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:34:07,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:07,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:07,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:34:07,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 54367998, now seen corresponding path program 1 times [2023-12-18 21:34:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712984522] [2023-12-18 21:34:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:07,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712984522] [2023-12-18 21:34:07,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712984522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:07,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15079656] [2023-12-18 21:34:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:07,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:07,776 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 21:34:07,790 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 21:34:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:07,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:34:07,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:07,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:08,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:08,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:08,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15079656] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:08,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:08,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-12-18 21:34:08,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704290791] [2023-12-18 21:34:08,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 21:34:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 21:34:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-18 21:34:08,243 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:08,455 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-12-18 21:34:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:34:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 21:34:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:08,457 INFO L225 Difference]: With dead ends: 35 [2023-12-18 21:34:08,457 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 21:34:08,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:34:08,458 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:08,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 21:34:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2023-12-18 21:34:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-18 21:34:08,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-12-18 21:34:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:08,463 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-18 21:34:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-18 21:34:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:34:08,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:08,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:08,475 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 21:34:08,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:08,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:08,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash 111626300, now seen corresponding path program 1 times [2023-12-18 21:34:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420872632] [2023-12-18 21:34:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:08,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122539684] [2023-12-18 21:34:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:08,693 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 21:34:08,703 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 21:34:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:08,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 21:34:08,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:08,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:08,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:08,893 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 14 treesize of output 12 [2023-12-18 21:34:08,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 21:34:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420872632] [2023-12-18 21:34:08,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122539684] [2023-12-18 21:34:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122539684] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:08,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:08,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-18 21:34:08,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223317489] [2023-12-18 21:34:08,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:34:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:34:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:34:08,908 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:08,954 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-18 21:34:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:34:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 21:34:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:08,955 INFO L225 Difference]: With dead ends: 35 [2023-12-18 21:34:08,955 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 21:34:08,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:34:08,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:08,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 21:34:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-18 21:34:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-18 21:34:08,968 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-12-18 21:34:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:08,968 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-18 21:34:08,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-18 21:34:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 21:34:08,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:08,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:08,976 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 21:34:09,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 21:34:09,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:09,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash -230177790, now seen corresponding path program 2 times [2023-12-18 21:34:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:09,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398689506] [2023-12-18 21:34:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:09,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398689506] [2023-12-18 21:34:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398689506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59209116] [2023-12-18 21:34:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:09,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:09,267 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 21:34:09,270 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 21:34:09,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:09,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:09,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:34:09,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59209116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:09,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:09,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:34:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823820938] [2023-12-18 21:34:09,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:09,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:34:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:09,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:34:09,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:34:09,453 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:09,557 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-12-18 21:34:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:34:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 21:34:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:09,559 INFO L225 Difference]: With dead ends: 30 [2023-12-18 21:34:09,559 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 21:34:09,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:34:09,560 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:09,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 21:34:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-12-18 21:34:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-18 21:34:09,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-12-18 21:34:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:09,567 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-18 21:34:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-18 21:34:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 21:34:09,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:09,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:09,578 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 21:34:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:09,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:09,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2013377864, now seen corresponding path program 3 times [2023-12-18 21:34:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:09,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641217807] [2023-12-18 21:34:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:09,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641217807] [2023-12-18 21:34:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641217807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830554318] [2023-12-18 21:34:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:34:09,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:09,855 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 21:34:09,873 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 21:34:09,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:34:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:09,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:34:09,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830554318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:09,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:34:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102734085] [2023-12-18 21:34:09,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:34:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:09,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:34:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:34:09,997 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:10,063 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-12-18 21:34:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:34:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-18 21:34:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:10,064 INFO L225 Difference]: With dead ends: 33 [2023-12-18 21:34:10,064 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 21:34:10,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:34:10,065 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:10,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 21:34:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-12-18 21:34:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-18 21:34:10,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-12-18 21:34:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:10,069 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-18 21:34:10,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-18 21:34:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:34:10,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:10,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:10,083 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 21:34:10,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:10,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:10,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:10,277 INFO L85 PathProgramCache]: Analyzing trace with hash -919717436, now seen corresponding path program 4 times [2023-12-18 21:34:10,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:10,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030974883] [2023-12-18 21:34:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:10,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030974883] [2023-12-18 21:34:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030974883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849822226] [2023-12-18 21:34:10,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:34:10,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:10,622 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 21:34:10,644 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 21:34:10,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:34:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:10,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 21:34:10,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:10,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:10,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:11,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:11,037 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:34:11,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-12-18 21:34:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:11,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:11,311 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:34:11,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-12-18 21:34:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849822226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:11,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:11,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2023-12-18 21:34:11,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458543495] [2023-12-18 21:34:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:34:11,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:34:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:34:11,554 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:12,706 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-12-18 21:34:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 21:34:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:34:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:12,709 INFO L225 Difference]: With dead ends: 53 [2023-12-18 21:34:12,709 INFO L226 Difference]: Without dead ends: 42 [2023-12-18 21:34:12,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 21:34:12,710 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:12,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:34:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-18 21:34:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-12-18 21:34:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-12-18 21:34:12,718 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 18 [2023-12-18 21:34:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:12,719 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-12-18 21:34:12,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-12-18 21:34:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:34:12,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:12,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:12,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 21:34:12,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:12,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:12,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:12,926 INFO L85 PathProgramCache]: Analyzing trace with hash -862459134, now seen corresponding path program 1 times [2023-12-18 21:34:12,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:12,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103687635] [2023-12-18 21:34:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:12,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:12,944 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:12,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317856749] [2023-12-18 21:34:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:12,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:12,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:12,946 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 21:34:12,970 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 21:34:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:13,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:34:13,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:13,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:13,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:13,127 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 16 treesize of output 14 [2023-12-18 21:34:13,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:34:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103687635] [2023-12-18 21:34:13,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317856749] [2023-12-18 21:34:13,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317856749] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:13,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:13,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-18 21:34:13,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260610936] [2023-12-18 21:34:13,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:34:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:34:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:34:13,150 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:13,228 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-12-18 21:34:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:34:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:34:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:13,229 INFO L225 Difference]: With dead ends: 58 [2023-12-18 21:34:13,229 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 21:34:13,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:34:13,230 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:13,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 57 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 21:34:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-12-18 21:34:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-18 21:34:13,238 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 18 [2023-12-18 21:34:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:13,238 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-18 21:34:13,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-18 21:34:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:34:13,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:13,239 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:13,245 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 21:34:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:13,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:13,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1651358520, now seen corresponding path program 5 times [2023-12-18 21:34:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:13,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258785201] [2023-12-18 21:34:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258785201] [2023-12-18 21:34:13,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258785201] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159662600] [2023-12-18 21:34:13,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:34:13,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:13,545 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 21:34:13,549 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 21:34:13,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 21:34:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:13,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:34:13,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:13,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159662600] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:13,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 21:34:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443754400] [2023-12-18 21:34:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:34:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:34:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:34:13,721 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:13,836 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-12-18 21:34:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:34:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-18 21:34:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:13,838 INFO L225 Difference]: With dead ends: 48 [2023-12-18 21:34:13,838 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:34:13,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:34:13,840 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:13,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:34:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-12-18 21:34:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-18 21:34:13,851 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 19 [2023-12-18 21:34:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:13,852 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-18 21:34:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-18 21:34:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 21:34:13,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:13,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:13,876 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 21:34:14,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:14,069 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:14,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash -109476352, now seen corresponding path program 2 times [2023-12-18 21:34:14,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:14,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997399134] [2023-12-18 21:34:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:14,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:14,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277571881] [2023-12-18 21:34:14,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:14,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:14,084 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 21:34:14,090 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 21:34:14,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:14,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:14,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:34:14,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:14,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997399134] [2023-12-18 21:34:14,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277571881] [2023-12-18 21:34:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277571881] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:14,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 21:34:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105000216] [2023-12-18 21:34:14,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:14,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:34:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:34:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:34:14,283 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:14,357 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-12-18 21:34:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:34:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-18 21:34:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:14,357 INFO L225 Difference]: With dead ends: 51 [2023-12-18 21:34:14,358 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 21:34:14,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:34:14,358 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:14,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 21:34:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-18 21:34:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-18 21:34:14,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-12-18 21:34:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:14,363 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-18 21:34:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-18 21:34:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:34:14,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:14,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:14,372 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 21:34:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 21:34:14,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:14,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 472759102, now seen corresponding path program 6 times [2023-12-18 21:34:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174358703] [2023-12-18 21:34:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174358703] [2023-12-18 21:34:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174358703] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294964128] [2023-12-18 21:34:15,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:34:15,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:15,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:15,115 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 21:34:15,117 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 21:34:15,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 21:34:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:15,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-18 21:34:15,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:15,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:15,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:15,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:15,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:15,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294964128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:16,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:16,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 34 [2023-12-18 21:34:16,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84565484] [2023-12-18 21:34:16,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:16,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-18 21:34:16,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-18 21:34:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2023-12-18 21:34:16,148 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:16,738 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-12-18 21:34:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:34:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 21:34:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:16,739 INFO L225 Difference]: With dead ends: 42 [2023-12-18 21:34:16,739 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 21:34:16,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=1698, Unknown=1, NotChecked=0, Total=1892 [2023-12-18 21:34:16,740 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:16,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 102 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:34:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 21:34:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-12-18 21:34:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-18 21:34:16,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-12-18 21:34:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:16,746 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-18 21:34:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-18 21:34:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:34:16,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:16,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:16,758 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 21:34:16,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:16,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:16,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 530017404, now seen corresponding path program 3 times [2023-12-18 21:34:16,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:16,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883944538] [2023-12-18 21:34:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:16,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:16,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:16,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183418871] [2023-12-18 21:34:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:34:16,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:16,970 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 21:34:16,973 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 21:34:17,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:34:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:17,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 21:34:17,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:17,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-18 21:34:17,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:17,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:34:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:34:17,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:34:17,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883944538] [2023-12-18 21:34:17,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183418871] [2023-12-18 21:34:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183418871] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:17,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 21:34:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155440524] [2023-12-18 21:34:17,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:34:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:34:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:34:17,198 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:17,303 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-12-18 21:34:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:34:17,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 21:34:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:17,304 INFO L225 Difference]: With dead ends: 39 [2023-12-18 21:34:17,304 INFO L226 Difference]: Without dead ends: 35 [2023-12-18 21:34:17,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:34:17,305 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:17,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 14 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:34:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-18 21:34:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-12-18 21:34:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-18 21:34:17,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-12-18 21:34:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:17,313 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-18 21:34:17,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-18 21:34:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 21:34:17,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:17,314 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:17,322 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 21:34:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 21:34:17,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:17,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1177770942, now seen corresponding path program 7 times [2023-12-18 21:34:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540146881] [2023-12-18 21:34:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540146881] [2023-12-18 21:34:17,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540146881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023475760] [2023-12-18 21:34:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:34:17,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:17,639 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 21:34:17,642 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 21:34:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:17,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:34:17,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:17,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:17,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023475760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:17,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:17,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:34:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587053107] [2023-12-18 21:34:17,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:34:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:34:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:34:17,853 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:18,057 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-18 21:34:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:34:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-18 21:34:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:18,059 INFO L225 Difference]: With dead ends: 49 [2023-12-18 21:34:18,059 INFO L226 Difference]: Without dead ends: 45 [2023-12-18 21:34:18,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:34:18,059 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:18,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-18 21:34:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2023-12-18 21:34:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-18 21:34:18,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2023-12-18 21:34:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:18,066 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-18 21:34:18,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-18 21:34:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 21:34:18,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:18,067 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:18,074 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 21:34:18,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 21:34:18,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:18,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1987303160, now seen corresponding path program 8 times [2023-12-18 21:34:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407588310] [2023-12-18 21:34:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:18,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:18,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407588310] [2023-12-18 21:34:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407588310] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:18,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194748206] [2023-12-18 21:34:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:18,400 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 21:34:18,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 21:34:18,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:18,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:18,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:34:18,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:18,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:18,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194748206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:18,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:18,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:34:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788748661] [2023-12-18 21:34:18,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:18,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:34:18,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:34:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:34:18,621 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:18,724 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-12-18 21:34:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:34:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-18 21:34:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:18,725 INFO L225 Difference]: With dead ends: 52 [2023-12-18 21:34:18,725 INFO L226 Difference]: Without dead ends: 32 [2023-12-18 21:34:18,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:34:18,726 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:18,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-18 21:34:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-12-18 21:34:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-12-18 21:34:18,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2023-12-18 21:34:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:18,733 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-12-18 21:34:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-12-18 21:34:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:34:18,734 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:18,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:18,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-18 21:34:18,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 21:34:18,939 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:18,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash 152727940, now seen corresponding path program 9 times [2023-12-18 21:34:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:18,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267127836] [2023-12-18 21:34:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:19,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:19,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267127836] [2023-12-18 21:34:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267127836] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:19,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059779998] [2023-12-18 21:34:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:34:19,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:19,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:19,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 21:34:19,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 21:34:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:19,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-18 21:34:19,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:19,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:19,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:19,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:19,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:20,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:20,048 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-18 21:34:20,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 13 [2023-12-18 21:34:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:20,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:20,560 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-12-18 21:34:20,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 17 [2023-12-18 21:34:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059779998] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:20,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:20,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2023-12-18 21:34:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058611638] [2023-12-18 21:34:20,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:20,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-18 21:34:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-18 21:34:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1996, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 21:34:20,768 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 47 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:21,551 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-12-18 21:34:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 21:34:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 21:34:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:21,552 INFO L225 Difference]: With dead ends: 48 [2023-12-18 21:34:21,552 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:34:21,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2023-12-18 21:34:21,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:21,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:34:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:34:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-12-18 21:34:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-18 21:34:21,563 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-12-18 21:34:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:21,563 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-18 21:34:21,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-18 21:34:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:34:21,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:21,564 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:21,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:21,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 21:34:21,770 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:21,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash 832786310, now seen corresponding path program 4 times [2023-12-18 21:34:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:21,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620283334] [2023-12-18 21:34:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:21,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:21,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701955944] [2023-12-18 21:34:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:34:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:21,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:21,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 21:34:21,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:34:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:21,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-18 21:34:21,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:21,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:34:21,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-18 21:34:21,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:21,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:34:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:34:21,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:34:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620283334] [2023-12-18 21:34:22,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701955944] [2023-12-18 21:34:22,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701955944] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:22,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:22,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-12-18 21:34:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617379311] [2023-12-18 21:34:22,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:22,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:34:22,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:34:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:34:22,071 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:22,329 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-12-18 21:34:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:34:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 21:34:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:22,329 INFO L225 Difference]: With dead ends: 48 [2023-12-18 21:34:22,329 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:34:22,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:34:22,330 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:22,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:34:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-12-18 21:34:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-18 21:34:22,339 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-12-18 21:34:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:22,340 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-18 21:34:22,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-18 21:34:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 21:34:22,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:22,340 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:22,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:22,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:22,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2069182600, now seen corresponding path program 10 times [2023-12-18 21:34:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565512651] [2023-12-18 21:34:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:22,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565512651] [2023-12-18 21:34:22,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565512651] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:22,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610045942] [2023-12-18 21:34:22,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:34:22,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:22,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:22,679 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:22,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 21:34:22,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:34:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:22,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:34:22,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:22,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610045942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:22,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 21:34:22,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251112633] [2023-12-18 21:34:22,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:22,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:34:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:34:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:34:22,951 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:23,143 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-12-18 21:34:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:34:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 21:34:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:23,144 INFO L225 Difference]: With dead ends: 68 [2023-12-18 21:34:23,144 INFO L226 Difference]: Without dead ends: 64 [2023-12-18 21:34:23,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-12-18 21:34:23,145 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-18 21:34:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 30. [2023-12-18 21:34:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-12-18 21:34:23,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2023-12-18 21:34:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:23,157 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-12-18 21:34:23,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-12-18 21:34:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 21:34:23,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:23,159 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:23,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:23,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 21:34:23,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:23,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1208253182, now seen corresponding path program 11 times [2023-12-18 21:34:23,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061645938] [2023-12-18 21:34:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:23,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061645938] [2023-12-18 21:34:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061645938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388290465] [2023-12-18 21:34:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:34:23,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:23,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:23,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:23,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 21:34:23,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 21:34:23,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:23,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:34:23,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:23,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:23,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388290465] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:23,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:23,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 21:34:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087189571] [2023-12-18 21:34:23,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:23,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:34:23,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:34:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:34:23,805 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:23,922 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-12-18 21:34:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:34:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-18 21:34:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:23,924 INFO L225 Difference]: With dead ends: 71 [2023-12-18 21:34:23,925 INFO L226 Difference]: Without dead ends: 43 [2023-12-18 21:34:23,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:34:23,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:23,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 32 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-18 21:34:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2023-12-18 21:34:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-18 21:34:23,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 29 [2023-12-18 21:34:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:23,935 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-18 21:34:23,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-18 21:34:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 21:34:23,935 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:23,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:23,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:24,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 21:34:24,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:24,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1107742850, now seen corresponding path program 12 times [2023-12-18 21:34:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:24,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156094822] [2023-12-18 21:34:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:24,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:24,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156094822] [2023-12-18 21:34:24,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156094822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166206017] [2023-12-18 21:34:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:34:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:24,950 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:24,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 21:34:25,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 21:34:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:25,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 21:34:25,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:25,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:25,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:25,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:25,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:25,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:25,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:25,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:26,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166206017] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:26,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:26,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 52 [2023-12-18 21:34:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527428721] [2023-12-18 21:34:26,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-18 21:34:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-18 21:34:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2475, Unknown=1, NotChecked=0, Total=2652 [2023-12-18 21:34:26,734 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:27,708 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-12-18 21:34:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 21:34:27,708 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 21:34:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:27,709 INFO L225 Difference]: With dead ends: 57 [2023-12-18 21:34:27,709 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 21:34:27,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=3992, Unknown=1, NotChecked=0, Total=4290 [2023-12-18 21:34:27,710 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:27,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:34:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 21:34:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-12-18 21:34:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-12-18 21:34:27,723 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2023-12-18 21:34:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:27,723 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-12-18 21:34:27,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-12-18 21:34:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 21:34:27,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:27,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:27,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:27,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:27,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:27,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash -849577412, now seen corresponding path program 5 times [2023-12-18 21:34:27,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:27,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779555361] [2023-12-18 21:34:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:27,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:27,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976161420] [2023-12-18 21:34:27,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:34:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:27,943 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:27,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 21:34:28,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 21:34:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:28,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 21:34:28,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:28,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-18 21:34:28,080 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:34:28,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:34:28,098 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 21:34:28,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-12-18 21:34:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:34:28,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:28,253 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 20 treesize of output 18 [2023-12-18 21:34:28,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 21:34:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:34:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779555361] [2023-12-18 21:34:28,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976161420] [2023-12-18 21:34:28,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976161420] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:28,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:28,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2023-12-18 21:34:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317509531] [2023-12-18 21:34:28,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 21:34:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 21:34:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:34:28,266 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:28,397 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-12-18 21:34:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 21:34:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 21:34:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:28,398 INFO L225 Difference]: With dead ends: 61 [2023-12-18 21:34:28,398 INFO L226 Difference]: Without dead ends: 49 [2023-12-18 21:34:28,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:34:28,398 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:28,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 54 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-18 21:34:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2023-12-18 21:34:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-12-18 21:34:28,412 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 30 [2023-12-18 21:34:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:28,412 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-12-18 21:34:28,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-12-18 21:34:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 21:34:28,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:28,412 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:28,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:28,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:28,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2008077442, now seen corresponding path program 13 times [2023-12-18 21:34:28,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:28,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606615920] [2023-12-18 21:34:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:28,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:28,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606615920] [2023-12-18 21:34:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606615920] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835325652] [2023-12-18 21:34:28,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:34:28,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:28,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:28,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 21:34:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:28,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:34:28,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:28,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:29,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835325652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:29,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:29,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:34:29,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537499462] [2023-12-18 21:34:29,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:29,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:34:29,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:34:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:34:29,094 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:29,348 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2023-12-18 21:34:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:34:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-18 21:34:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:29,349 INFO L225 Difference]: With dead ends: 75 [2023-12-18 21:34:29,349 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 21:34:29,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:34:29,351 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:29,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:34:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 21:34:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2023-12-18 21:34:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-12-18 21:34:29,366 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2023-12-18 21:34:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:29,366 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-12-18 21:34:29,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-12-18 21:34:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:34:29,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:29,367 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:29,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:29,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:29,573 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:29,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash -994489144, now seen corresponding path program 14 times [2023-12-18 21:34:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:29,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065278590] [2023-12-18 21:34:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:29,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:29,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:29,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065278590] [2023-12-18 21:34:29,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065278590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:29,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948913974] [2023-12-18 21:34:29,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:29,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:29,728 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:29,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 21:34:29,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:29,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:34:29,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:29,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:30,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948913974] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:30,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:30,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:34:30,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757991000] [2023-12-18 21:34:30,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:30,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:34:30,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:34:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:34:30,035 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:30,188 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-12-18 21:34:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 21:34:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-18 21:34:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:30,189 INFO L225 Difference]: With dead ends: 78 [2023-12-18 21:34:30,189 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 21:34:30,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:34:30,191 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:30,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 20 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 21:34:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-12-18 21:34:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-18 21:34:30,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 33 [2023-12-18 21:34:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:30,206 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-18 21:34:30,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-18 21:34:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:34:30,207 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:30,207 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:30,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:30,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-18 21:34:30,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:30,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash -425371324, now seen corresponding path program 15 times [2023-12-18 21:34:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086797906] [2023-12-18 21:34:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086797906] [2023-12-18 21:34:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086797906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249845521] [2023-12-18 21:34:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:34:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:31,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 21:34:31,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 21:34:31,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:31,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-18 21:34:31,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:31,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:31,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:31,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:31,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:31,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:32,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:32,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:32,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249845521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:33,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:33,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 61 [2023-12-18 21:34:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236290954] [2023-12-18 21:34:33,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-18 21:34:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-18 21:34:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3450, Unknown=1, NotChecked=0, Total=3660 [2023-12-18 21:34:33,701 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:35,062 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2023-12-18 21:34:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 21:34:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 21:34:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:35,063 INFO L225 Difference]: With dead ends: 64 [2023-12-18 21:34:35,063 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 21:34:35,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=349, Invalid=5502, Unknown=1, NotChecked=0, Total=5852 [2023-12-18 21:34:35,065 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:35,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 21:34:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 21:34:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2023-12-18 21:34:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-12-18 21:34:35,081 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2023-12-18 21:34:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:35,081 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-12-18 21:34:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-12-18 21:34:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:34:35,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:35,082 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:35,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:35,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 21:34:35,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:35,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash -167205886, now seen corresponding path program 6 times [2023-12-18 21:34:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:35,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127759438] [2023-12-18 21:34:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:35,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:35,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362760888] [2023-12-18 21:34:35,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:34:35,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:35,307 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:35,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 21:34:35,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 21:34:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:35,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 21:34:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:35,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:34:35,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-18 21:34:35,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-18 21:34:35,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:35,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:34:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:34:35,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:34:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127759438] [2023-12-18 21:34:35,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362760888] [2023-12-18 21:34:35,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362760888] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:35,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:35,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2023-12-18 21:34:35,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444845097] [2023-12-18 21:34:35,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:34:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:34:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:34:35,677 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:36,408 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-12-18 21:34:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:34:36,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 21:34:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:36,410 INFO L225 Difference]: With dead ends: 69 [2023-12-18 21:34:36,410 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 21:34:36,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:34:36,411 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:36,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:34:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 21:34:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2023-12-18 21:34:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-12-18 21:34:36,431 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2023-12-18 21:34:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:36,432 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-12-18 21:34:36,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-12-18 21:34:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 21:34:36,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:36,432 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:36,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:36,639 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:36,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash 37411912, now seen corresponding path program 16 times [2023-12-18 21:34:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:36,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117842678] [2023-12-18 21:34:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117842678] [2023-12-18 21:34:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117842678] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986281972] [2023-12-18 21:34:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:34:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:36,856 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:36,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 21:34:36,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:34:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:36,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:34:36,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:37,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:37,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986281972] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:37,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:37,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 21:34:37,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206251079] [2023-12-18 21:34:37,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:37,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:34:37,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:34:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:34:37,251 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:37,577 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2023-12-18 21:34:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:34:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-18 21:34:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:37,578 INFO L225 Difference]: With dead ends: 100 [2023-12-18 21:34:37,578 INFO L226 Difference]: Without dead ends: 96 [2023-12-18 21:34:37,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 21:34:37,579 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:37,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 29 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:34:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-18 21:34:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 38. [2023-12-18 21:34:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-12-18 21:34:37,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 35 [2023-12-18 21:34:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-12-18 21:34:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-12-18 21:34:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 21:34:37,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:37,595 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:37,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:37,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:37,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:37,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash -544570046, now seen corresponding path program 17 times [2023-12-18 21:34:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:37,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687662924] [2023-12-18 21:34:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:37,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:38,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687662924] [2023-12-18 21:34:38,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687662924] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299763049] [2023-12-18 21:34:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:34:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:38,009 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:38,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 21:34:38,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 21:34:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:38,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:34:38,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:38,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299763049] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:38,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 21:34:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800381514] [2023-12-18 21:34:38,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:34:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:34:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:34:38,403 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:38,578 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2023-12-18 21:34:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:34:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-18 21:34:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:38,579 INFO L225 Difference]: With dead ends: 103 [2023-12-18 21:34:38,579 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 21:34:38,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:34:38,580 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:38,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 32 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 21:34:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2023-12-18 21:34:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-12-18 21:34:38,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 37 [2023-12-18 21:34:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:38,597 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-12-18 21:34:38,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-12-18 21:34:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:34:38,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:38,598 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:38,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:38,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-18 21:34:38,804 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:38,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -614206530, now seen corresponding path program 18 times [2023-12-18 21:34:38,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:38,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636114850] [2023-12-18 21:34:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:39,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:39,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636114850] [2023-12-18 21:34:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636114850] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549536825] [2023-12-18 21:34:39,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:34:39,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:39,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:39,908 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:39,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 21:34:40,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 21:34:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:40,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-18 21:34:40,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:40,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:40,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:40,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:40,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:40,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:41,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:41,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:41,522 INFO L349 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2023-12-18 21:34:41,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 22 [2023-12-18 21:34:41,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:41,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:43,828 INFO L349 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2023-12-18 21:34:43,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 29 [2023-12-18 21:34:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:44,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549536825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:44,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:44,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35, 35] total 97 [2023-12-18 21:34:44,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932168982] [2023-12-18 21:34:44,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:44,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-18 21:34:44,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-18 21:34:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=8614, Unknown=0, NotChecked=0, Total=9312 [2023-12-18 21:34:44,570 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:51,760 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2023-12-18 21:34:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-18 21:34:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-18 21:34:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:51,761 INFO L225 Difference]: With dead ends: 158 [2023-12-18 21:34:51,761 INFO L226 Difference]: Without dead ends: 137 [2023-12-18 21:34:51,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7965 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2620, Invalid=26792, Unknown=0, NotChecked=0, Total=29412 [2023-12-18 21:34:51,767 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:51,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 371 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-18 21:34:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-18 21:34:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 67. [2023-12-18 21:34:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-12-18 21:34:51,804 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 38 [2023-12-18 21:34:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:51,804 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-12-18 21:34:51,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-12-18 21:34:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:34:51,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:51,805 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:51,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-18 21:34:52,006 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:52,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1894070208, now seen corresponding path program 7 times [2023-12-18 21:34:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707551116] [2023-12-18 21:34:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:52,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430234111] [2023-12-18 21:34:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:34:52,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:52,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:52,020 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:52,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 21:34:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:52,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 21:34:52,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:52,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:34:52,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:52,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-12-18 21:34:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:34:52,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:52,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-12-18 21:34:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 43 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 21:34:52,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:52,936 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_431| Int) (|v_ULTIMATE.start_main_~i~0#1_430| Int) (v_ArrVal_1226 Int) (v_ArrVal_1228 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_431| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_430| (+ |v_ULTIMATE.start_main_~i~0#1_431| 1)) (= (select (store (store (store (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 3) (+ (* |v_ULTIMATE.start_main_~i~0#1_431| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1226) (+ (* |v_ULTIMATE.start_main_~i~0#1_430| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1228) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) 3))) is different from false [2023-12-18 21:34:52,944 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 37 treesize of output 35 [2023-12-18 21:34:52,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12502 treesize of output 12246 [2023-12-18 21:34:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 7 not checked. [2023-12-18 21:34:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707551116] [2023-12-18 21:34:53,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430234111] [2023-12-18 21:34:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430234111] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:53,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-12-18 21:34:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287806602] [2023-12-18 21:34:53,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 21:34:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 21:34:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=557, Unknown=1, NotChecked=48, Total=702 [2023-12-18 21:34:53,046 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:53,318 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-12-18 21:34:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:34:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-18 21:34:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:53,319 INFO L225 Difference]: With dead ends: 82 [2023-12-18 21:34:53,319 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 21:34:53,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=645, Unknown=1, NotChecked=52, Total=812 [2023-12-18 21:34:53,320 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:53,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 86 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 396 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2023-12-18 21:34:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 21:34:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-18 21:34:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2023-12-18 21:34:53,352 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 38 [2023-12-18 21:34:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:53,352 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2023-12-18 21:34:53,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2023-12-18 21:34:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 21:34:53,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:53,353 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:53,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:53,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 21:34:53,557 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:53,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1006897910, now seen corresponding path program 8 times [2023-12-18 21:34:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:53,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202433244] [2023-12-18 21:34:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:53,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:53,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341335408] [2023-12-18 21:34:53,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:53,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:53,571 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:53,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 21:34:53,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:53,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:34:53,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:53,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202433244] [2023-12-18 21:34:54,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341335408] [2023-12-18 21:34:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341335408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:54,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-12-18 21:34:54,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990375070] [2023-12-18 21:34:54,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:54,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 21:34:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 21:34:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-12-18 21:34:54,030 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:54,256 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2023-12-18 21:34:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:34:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-18 21:34:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:54,257 INFO L225 Difference]: With dead ends: 119 [2023-12-18 21:34:54,257 INFO L226 Difference]: Without dead ends: 68 [2023-12-18 21:34:54,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 21:34:54,262 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:54,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 22 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-18 21:34:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2023-12-18 21:34:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-12-18 21:34:54,287 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 41 [2023-12-18 21:34:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:54,287 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-12-18 21:34:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-12-18 21:34:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 21:34:54,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:54,288 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:54,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-18 21:34:54,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-18 21:34:54,494 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:54,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1078052230, now seen corresponding path program 9 times [2023-12-18 21:34:54,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:54,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608999522] [2023-12-18 21:34:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:54,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:34:54,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793263838] [2023-12-18 21:34:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:34:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:54,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:54,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:54,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-18 21:34:54,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 21:34:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:54,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 21:34:54,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:54,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:34:54,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-12-18 21:34:54,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:54,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2023-12-18 21:34:54,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:54,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2023-12-18 21:34:54,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:34:54,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2023-12-18 21:34:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 75 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 21:34:54,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 21:34:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608999522] [2023-12-18 21:34:55,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:34:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793263838] [2023-12-18 21:34:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793263838] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:55,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:34:55,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2023-12-18 21:34:55,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471980340] [2023-12-18 21:34:55,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:34:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:34:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:34:55,145 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:55,908 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2023-12-18 21:34:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 21:34:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-18 21:34:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:55,909 INFO L225 Difference]: With dead ends: 70 [2023-12-18 21:34:55,909 INFO L226 Difference]: Without dead ends: 66 [2023-12-18 21:34:55,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=1552, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:34:55,910 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:55,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-18 21:34:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2023-12-18 21:34:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-12-18 21:34:55,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 42 [2023-12-18 21:34:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:55,930 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-12-18 21:34:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-12-18 21:34:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 21:34:55,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:55,930 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:55,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:56,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:56,131 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:56,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2021709186, now seen corresponding path program 19 times [2023-12-18 21:34:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:56,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081252996] [2023-12-18 21:34:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081252996] [2023-12-18 21:34:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081252996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891415573] [2023-12-18 21:34:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:34:56,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:56,389 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:56,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-18 21:34:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:56,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:34:56,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:56,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:34:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:56,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891415573] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:34:56,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:34:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-18 21:34:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743585380] [2023-12-18 21:34:56,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:34:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:34:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:34:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:34:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:34:56,866 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:34:57,112 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2023-12-18 21:34:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:34:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 21:34:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:34:57,112 INFO L225 Difference]: With dead ends: 141 [2023-12-18 21:34:57,113 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 21:34:57,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:34:57,113 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:34:57,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 35 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:34:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 21:34:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 47. [2023-12-18 21:34:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-12-18 21:34:57,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 45 [2023-12-18 21:34:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:34:57,136 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-12-18 21:34:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:34:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-12-18 21:34:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 21:34:57,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:34:57,137 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:34:57,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:57,338 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:34:57,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:34:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1003354114, now seen corresponding path program 20 times [2023-12-18 21:34:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:34:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650889169] [2023-12-18 21:34:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:34:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:34:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:34:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:34:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:34:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650889169] [2023-12-18 21:34:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650889169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:34:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020060089] [2023-12-18 21:34:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:34:58,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:34:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:34:58,862 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:34:58,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-18 21:34:58,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:34:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:34:58,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-18 21:34:59,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:34:59,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:34:59,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:34:59,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:00,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:00,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:00,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020060089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:03,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:03,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 32, 32] total 88 [2023-12-18 21:35:03,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034618025] [2023-12-18 21:35:03,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:03,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-12-18 21:35:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-12-18 21:35:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=7347, Unknown=1, NotChecked=0, Total=7656 [2023-12-18 21:35:03,661 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 88 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:06,614 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2023-12-18 21:35:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-18 21:35:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-18 21:35:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:06,614 INFO L225 Difference]: With dead ends: 85 [2023-12-18 21:35:06,615 INFO L226 Difference]: Without dead ends: 81 [2023-12-18 21:35:06,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=506, Invalid=11483, Unknown=1, NotChecked=0, Total=11990 [2023-12-18 21:35:06,616 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:06,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 176 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-18 21:35:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-18 21:35:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2023-12-18 21:35:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-12-18 21:35:06,646 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 46 [2023-12-18 21:35:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:06,646 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-12-18 21:35:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-12-18 21:35:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 21:35:06,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:06,647 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:06,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-18 21:35:06,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-18 21:35:06,848 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:06,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1297468476, now seen corresponding path program 10 times [2023-12-18 21:35:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664099213] [2023-12-18 21:35:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:06,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:06,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:06,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509762044] [2023-12-18 21:35:06,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:35:06,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:06,861 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:06,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-18 21:35:06,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:35:06,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:06,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 21:35:06,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:06,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:35:07,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-18 21:35:07,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-18 21:35:07,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-12-18 21:35:07,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-18 21:35:07,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:35:07,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:35:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 105 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 21:35:07,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 105 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 21:35:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664099213] [2023-12-18 21:35:07,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509762044] [2023-12-18 21:35:07,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509762044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:07,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2023-12-18 21:35:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146572722] [2023-12-18 21:35:07,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:07,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:35:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:35:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:35:07,251 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:09,452 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2023-12-18 21:35:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-18 21:35:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-18 21:35:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:09,453 INFO L225 Difference]: With dead ends: 144 [2023-12-18 21:35:09,453 INFO L226 Difference]: Without dead ends: 140 [2023-12-18 21:35:09,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1445, Invalid=6037, Unknown=0, NotChecked=0, Total=7482 [2023-12-18 21:35:09,454 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:09,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:35:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-18 21:35:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 63. [2023-12-18 21:35:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-12-18 21:35:09,492 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 46 [2023-12-18 21:35:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:09,492 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-12-18 21:35:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-12-18 21:35:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 21:35:09,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:09,493 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:09,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-18 21:35:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:09,694 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:09,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -291035902, now seen corresponding path program 21 times [2023-12-18 21:35:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:09,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919268522] [2023-12-18 21:35:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 36 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:09,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:09,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919268522] [2023-12-18 21:35:09,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919268522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:09,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057061572] [2023-12-18 21:35:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:35:09,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:09,976 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:09,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-18 21:35:10,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-18 21:35:10,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:10,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:35:10,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:10,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 45 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:10,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057061572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:10,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:10,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 21:35:10,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922305649] [2023-12-18 21:35:10,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:10,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:35:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:35:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:35:10,713 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:11,381 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2023-12-18 21:35:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-18 21:35:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-18 21:35:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:11,382 INFO L225 Difference]: With dead ends: 175 [2023-12-18 21:35:11,382 INFO L226 Difference]: Without dead ends: 171 [2023-12-18 21:35:11,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 62 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=2324, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 21:35:11,383 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:11,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 33 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:35:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-18 21:35:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 50. [2023-12-18 21:35:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-12-18 21:35:11,418 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 47 [2023-12-18 21:35:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:11,418 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-12-18 21:35:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-12-18 21:35:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 21:35:11,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:11,418 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:11,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-18 21:35:11,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:11,619 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:11,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -705977272, now seen corresponding path program 22 times [2023-12-18 21:35:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:11,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300793185] [2023-12-18 21:35:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:11,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 120 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300793185] [2023-12-18 21:35:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300793185] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119368535] [2023-12-18 21:35:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:35:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:11,960 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-18 21:35:12,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:35:12,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:12,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:35:12,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:12,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119368535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:12,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:12,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-18 21:35:12,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693439506] [2023-12-18 21:35:12,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:35:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:35:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:35:12,581 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:12,908 INFO L93 Difference]: Finished difference Result 178 states and 217 transitions. [2023-12-18 21:35:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:35:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-18 21:35:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:12,909 INFO L225 Difference]: With dead ends: 178 [2023-12-18 21:35:12,909 INFO L226 Difference]: Without dead ends: 102 [2023-12-18 21:35:12,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:35:12,910 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 144 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:12,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 31 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-18 21:35:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2023-12-18 21:35:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-12-18 21:35:12,940 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 49 [2023-12-18 21:35:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:12,941 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-12-18 21:35:12,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-12-18 21:35:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:35:12,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:12,941 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:12,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-18 21:35:13,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-18 21:35:13,144 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1467533116, now seen corresponding path program 23 times [2023-12-18 21:35:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809357434] [2023-12-18 21:35:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809357434] [2023-12-18 21:35:14,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809357434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391847605] [2023-12-18 21:35:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:35:14,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:14,855 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:14,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-18 21:35:15,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-18 21:35:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:15,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-18 21:35:15,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:15,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:35:15,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:15,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:16,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:16,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:16,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:17,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:17,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:22,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:28,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:33,662 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-18 21:35:33,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-12-18 21:35:33,663 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-18 21:35:33,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-18 21:35:33,864 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:950) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 46 more [2023-12-18 21:35:33,867 INFO L158 Benchmark]: Toolchain (without parser) took 87905.36ms. Allocated memory was 190.8MB in the beginning and 336.6MB in the end (delta: 145.8MB). Free memory was 157.0MB in the beginning and 123.5MB in the end (delta: 33.5MB). Peak memory consumption was 180.3MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,867 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 190.8MB. Free memory is still 148.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:35:33,867 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.70ms. Allocated memory is still 190.8MB. Free memory was 157.0MB in the beginning and 145.7MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,868 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.42ms. Allocated memory is still 190.8MB. Free memory was 145.7MB in the beginning and 144.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,868 INFO L158 Benchmark]: Boogie Preprocessor took 51.93ms. Allocated memory is still 190.8MB. Free memory was 144.2MB in the beginning and 142.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,868 INFO L158 Benchmark]: RCFGBuilder took 345.93ms. Allocated memory is still 190.8MB. Free memory was 142.1MB in the beginning and 129.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,868 INFO L158 Benchmark]: TraceAbstraction took 87228.54ms. Allocated memory was 190.8MB in the beginning and 336.6MB in the end (delta: 145.8MB). Free memory was 128.5MB in the beginning and 123.5MB in the end (delta: 5.0MB). Peak memory consumption was 152.0MB. Max. memory is 8.0GB. [2023-12-18 21:35:33,869 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 190.8MB. Free memory is still 148.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.70ms. Allocated memory is still 190.8MB. Free memory was 157.0MB in the beginning and 145.7MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 47.42ms. Allocated memory is still 190.8MB. Free memory was 145.7MB in the beginning and 144.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 51.93ms. Allocated memory is still 190.8MB. Free memory was 144.2MB in the beginning and 142.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 345.93ms. Allocated memory is still 190.8MB. Free memory was 142.1MB in the beginning and 129.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 87228.54ms. Allocated memory was 190.8MB in the beginning and 336.6MB in the end (delta: 145.8MB). Free memory was 128.5MB in the beginning and 123.5MB in the end (delta: 5.0MB). Peak memory consumption was 152.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...