/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/ncomp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:19:33,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:19:33,227 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 21:19:33,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:19:33,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:19:33,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:19:33,255 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:19:33,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:19:33,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:19:33,258 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:19:33,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:19:33,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:19:33,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:19:33,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:19:33,260 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:19:33,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:19:33,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:19:33,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:19:33,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:19:33,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:19:33,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:19:33,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:19:33,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:19:33,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:19:33,265 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:19:33,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:19:33,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:19:33,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:19:33,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:19:33,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:19:33,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:19:33,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:19:33,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:19:33,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:19:33,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:19:33,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:19:33,497 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:19:33,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ncomp.c [2023-12-18 21:19:34,673 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:19:34,820 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:19:34,821 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ncomp.c [2023-12-18 21:19:34,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237608c56/2065fbabbf944468b7ddd881ffba7b79/FLAG897b11c2c [2023-12-18 21:19:34,839 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237608c56/2065fbabbf944468b7ddd881ffba7b79 [2023-12-18 21:19:34,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:19:34,842 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:19:34,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:19:34,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:19:34,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:19:34,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:19:34" (1/1) ... [2023-12-18 21:19:34,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2ae2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:34, skipping insertion in model container [2023-12-18 21:19:34,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:19:34" (1/1) ... [2023-12-18 21:19:34,862 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:19:34,963 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/ncomp.c[588,601] [2023-12-18 21:19:34,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:19:34,989 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:19:34,997 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/ncomp.c[588,601] [2023-12-18 21:19:35,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:19:35,012 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:19:35,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35 WrapperNode [2023-12-18 21:19:35,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:19:35,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:19:35,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:19:35,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:19:35,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,029 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,043 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 97 [2023-12-18 21:19:35,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:19:35,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:19:35,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:19:35,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:19:35,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,063 INFO L175 MemorySlicer]: Split 22 memory accesses to 5 slices as follows [2, 8, 4, 4, 4]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 6 writes are split as follows [0, 0, 2, 2, 2]. [2023-12-18 21:19:35,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,082 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:19:35,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:19:35,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:19:35,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:19:35,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (1/1) ... [2023-12-18 21:19:35,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:19:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:35,127 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 21:19:35,129 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 21:19:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:19:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:19:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:19:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:19:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:19:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-18 21:19:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:19:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:19:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:19:35,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:19:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-18 21:19:35,262 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:19:35,264 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:19:35,427 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:19:35,463 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:19:35,464 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-18 21:19:35,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:19:35 BoogieIcfgContainer [2023-12-18 21:19:35,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:19:35,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:19:35,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:19:35,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:19:35,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:19:34" (1/3) ... [2023-12-18 21:19:35,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed4d284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:19:35, skipping insertion in model container [2023-12-18 21:19:35,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:19:35" (2/3) ... [2023-12-18 21:19:35,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed4d284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:19:35, skipping insertion in model container [2023-12-18 21:19:35,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:19:35" (3/3) ... [2023-12-18 21:19:35,469 INFO L112 eAbstractionObserver]: Analyzing ICFG ncomp.c [2023-12-18 21:19:35,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:19:35,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:19:35,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:19:35,522 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;@4b7385ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:19:35,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:19:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 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 21:19:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 21:19:35,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:35,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:35,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1482130284, now seen corresponding path program 1 times [2023-12-18 21:19:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:35,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6329834] [2023-12-18 21:19:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6329834] [2023-12-18 21:19:35,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 21:19:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340673132] [2023-12-18 21:19:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:35,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:35,660 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 21:19:35,691 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 21:19:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:35,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 21:19:35,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:35,758 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 21:19:35,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:19:35,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340673132] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:19:35,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:19:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:19:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141340534] [2023-12-18 21:19:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:19:35,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:19:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:19:35,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:19:35,780 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 21:19:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:35,798 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2023-12-18 21:19:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:19:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2023-12-18 21:19:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:35,804 INFO L225 Difference]: With dead ends: 33 [2023-12-18 21:19:35,805 INFO L226 Difference]: Without dead ends: 15 [2023-12-18 21:19:35,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 21:19:35,808 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:35,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:19:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-18 21:19:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-18 21:19:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 21:19:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-18 21:19:35,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 13 [2023-12-18 21:19:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-18 21:19:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 21:19:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-18 21:19:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 21:19:35,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:35,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:35,851 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 21:19:36,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-18 21:19:36,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:36,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash -781065706, now seen corresponding path program 1 times [2023-12-18 21:19:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:36,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954306944] [2023-12-18 21:19:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:36,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377052659] [2023-12-18 21:19:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:36,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:36,090 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 21:19:36,092 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 21:19:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:36,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:19:36,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:36,313 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 21:19:36,440 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 21:19:36,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:19:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:36,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954306944] [2023-12-18 21:19:36,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377052659] [2023-12-18 21:19:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377052659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:19:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:19:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-18 21:19:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099077786] [2023-12-18 21:19:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:19:36,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 21:19:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 21:19:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:19:36,445 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 21:19:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:36,557 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-12-18 21:19:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:19:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2023-12-18 21:19:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:36,558 INFO L225 Difference]: With dead ends: 27 [2023-12-18 21:19:36,558 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 21:19:36,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:19:36,562 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:36,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:19:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 21:19:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-12-18 21:19:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 21:19:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-18 21:19:36,570 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2023-12-18 21:19:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:36,570 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-18 21:19:36,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 21:19:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-18 21:19:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:19:36,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:36,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:36,589 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 21:19:36,777 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,SelfDestructingSolverStorable1 [2023-12-18 21:19:36,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:36,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1600663738, now seen corresponding path program 1 times [2023-12-18 21:19:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261467315] [2023-12-18 21:19:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:36,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305557326] [2023-12-18 21:19:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:36,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:36,818 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 21:19:36,821 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 21:19:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:36,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 21:19:36,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:19:36,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:19:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261467315] [2023-12-18 21:19:36,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305557326] [2023-12-18 21:19:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305557326] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:19:36,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:19:36,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 21:19:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685589775] [2023-12-18 21:19:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:19:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 21:19:36,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 21:19:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:19:36,909 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 21:19:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:36,974 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2023-12-18 21:19:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:19:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 21:19:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:36,975 INFO L225 Difference]: With dead ends: 50 [2023-12-18 21:19:36,975 INFO L226 Difference]: Without dead ends: 37 [2023-12-18 21:19:36,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-18 21:19:36,976 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:36,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:19:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-18 21:19:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2023-12-18 21:19:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:19:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-12-18 21:19:36,982 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 14 [2023-12-18 21:19:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:36,982 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-12-18 21:19:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 21:19:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-12-18 21:19:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 21:19:36,983 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:36,983 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:37,004 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 21:19:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:37,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:37,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1409639357, now seen corresponding path program 1 times [2023-12-18 21:19:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745379985] [2023-12-18 21:19:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:37,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:37,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220448717] [2023-12-18 21:19:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:37,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:37,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:37,258 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 21:19:37,284 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 21:19:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:37,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 21:19:37,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:19:37,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 21:19:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745379985] [2023-12-18 21:19:37,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220448717] [2023-12-18 21:19:37,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220448717] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:19:37,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:19:37,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-18 21:19:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614222503] [2023-12-18 21:19:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:19:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 21:19:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 21:19:37,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 21:19:37,353 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 21:19:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:37,416 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-12-18 21:19:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 21:19:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2023-12-18 21:19:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:37,417 INFO L225 Difference]: With dead ends: 39 [2023-12-18 21:19:37,417 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 21:19:37,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:19:37,417 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:37,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:19:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 21:19:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-12-18 21:19:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 21:19:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-18 21:19:37,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2023-12-18 21:19:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:37,421 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-18 21:19:37,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 21:19:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-18 21:19:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 21:19:37,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:37,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:37,438 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 21:19:37,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:37,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:37,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1538952375, now seen corresponding path program 1 times [2023-12-18 21:19:37,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059788202] [2023-12-18 21:19:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:37,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921012949] [2023-12-18 21:19:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:37,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:37,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:37,651 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 21:19:37,672 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 21:19:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:37,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:19:37,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:37,796 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 21:19:37,859 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 21 treesize of output 17 [2023-12-18 21:19:37,863 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 23 treesize of output 11 [2023-12-18 21:19:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 21:19:37,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:38,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:38,019 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 213 treesize of output 163 [2023-12-18 21:19:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 21:19:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059788202] [2023-12-18 21:19:38,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921012949] [2023-12-18 21:19:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921012949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:38,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-12-18 21:19:38,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073971560] [2023-12-18 21:19:38,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:38,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:19:38,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:38,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:19:38,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:19:38,099 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:19:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:38,321 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-12-18 21:19:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:19:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) Word has length 16 [2023-12-18 21:19:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:38,322 INFO L225 Difference]: With dead ends: 46 [2023-12-18 21:19:38,322 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:19:38,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:19:38,323 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:38,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:19:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:19:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 23. [2023-12-18 21:19:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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 21:19:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-18 21:19:38,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2023-12-18 21:19:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:38,328 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-18 21:19:38,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:19:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-18 21:19:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:19:38,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:38,329 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:38,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 21:19:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:38,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:38,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -789049737, now seen corresponding path program 2 times [2023-12-18 21:19:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797150858] [2023-12-18 21:19:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:38,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:38,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142736309] [2023-12-18 21:19:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:19:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:38,558 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 21:19:38,577 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 21:19:38,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:19:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:38,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:19:38,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 21:19:38,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 21:19:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797150858] [2023-12-18 21:19:38,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142736309] [2023-12-18 21:19:38,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142736309] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:38,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 21:19:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104640407] [2023-12-18 21:19:38,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:38,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:19:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:19:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:19:38,677 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 21:19:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:38,790 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-12-18 21:19:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:19:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:19:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:38,791 INFO L225 Difference]: With dead ends: 66 [2023-12-18 21:19:38,791 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 21:19:38,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:19:38,792 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:38,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:19:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 21:19:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2023-12-18 21:19:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 21:19:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-12-18 21:19:38,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-12-18 21:19:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:38,799 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-12-18 21:19:38,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 21:19:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-12-18 21:19:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:19:38,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:38,800 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:38,808 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 21:19:39,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:39,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:39,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1840404100, now seen corresponding path program 1 times [2023-12-18 21:19:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191874692] [2023-12-18 21:19:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:39,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:39,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224347432] [2023-12-18 21:19:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:39,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:39,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:39,049 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 21:19:39,064 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 21:19:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:19:39,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-18 21:19:39,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:39,158 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 21:19:39,162 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 21:19:39,204 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 23 treesize of output 11 [2023-12-18 21:19:39,228 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 25 treesize of output 20 [2023-12-18 21:19:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:19:39,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:19:39,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191874692] [2023-12-18 21:19:39,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224347432] [2023-12-18 21:19:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224347432] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:39,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-12-18 21:19:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487335254] [2023-12-18 21:19:39,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:19:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:19:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:19:39,718 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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 21:19:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:41,561 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-12-18 21:19:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:19:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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) Word has length 19 [2023-12-18 21:19:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:41,562 INFO L225 Difference]: With dead ends: 71 [2023-12-18 21:19:41,562 INFO L226 Difference]: Without dead ends: 69 [2023-12-18 21:19:41,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2023-12-18 21:19:41,563 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:41,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 74 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:19:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-18 21:19:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 44. [2023-12-18 21:19:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 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 21:19:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-12-18 21:19:41,571 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2023-12-18 21:19:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:41,571 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-12-18 21:19:41,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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 21:19:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-12-18 21:19:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 21:19:41,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:41,575 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:41,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 21:19:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:41,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:41,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1734337946, now seen corresponding path program 3 times [2023-12-18 21:19:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342484368] [2023-12-18 21:19:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:41,813 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:41,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028183536] [2023-12-18 21:19:41,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:19:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:41,826 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 21:19:41,848 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 21:19:42,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:19:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:42,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:19:42,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 21:19:42,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 21:19:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342484368] [2023-12-18 21:19:42,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028183536] [2023-12-18 21:19:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028183536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:42,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 21:19:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658619523] [2023-12-18 21:19:42,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:19:42,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:19:42,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:19:42,203 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21:19:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:42,415 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-12-18 21:19:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:19:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-18 21:19:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:42,416 INFO L225 Difference]: With dead ends: 107 [2023-12-18 21:19:42,416 INFO L226 Difference]: Without dead ends: 72 [2023-12-18 21:19:42,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-12-18 21:19:42,418 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:42,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 65 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:19:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-18 21:19:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2023-12-18 21:19:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 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 21:19:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-12-18 21:19:42,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2023-12-18 21:19:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:42,443 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-12-18 21:19:42,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 21:19:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-12-18 21:19:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:19:42,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:42,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:42,452 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 21:19:42,649 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,SelfDestructingSolverStorable7 [2023-12-18 21:19:42,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:42,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 351229783, now seen corresponding path program 4 times [2023-12-18 21:19:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486975865] [2023-12-18 21:19:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:42,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:42,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887544037] [2023-12-18 21:19:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:19:42,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:42,688 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 21:19:42,713 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 21:19:43,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:19:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:43,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-18 21:19:43,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:43,238 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 21:19:43,243 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 21:19:43,264 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 19 treesize of output 18 [2023-12-18 21:19:43,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:43,302 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 26 treesize of output 28 [2023-12-18 21:19:43,394 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 29 treesize of output 24 [2023-12-18 21:19:43,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:43,420 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 52 treesize of output 46 [2023-12-18 21:19:43,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:43,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 53 [2023-12-18 21:19:43,459 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 23 treesize of output 11 [2023-12-18 21:19:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:19:43,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:44,065 INFO L349 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2023-12-18 21:19:44,066 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 392 treesize of output 283 [2023-12-18 21:19:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 21:19:44,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486975865] [2023-12-18 21:19:44,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887544037] [2023-12-18 21:19:44,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887544037] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:44,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2023-12-18 21:19:44,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284482438] [2023-12-18 21:19:44,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 21:19:44,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 21:19:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:19:44,404 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21:19:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:45,442 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-12-18 21:19:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:19:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 22 [2023-12-18 21:19:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:45,444 INFO L225 Difference]: With dead ends: 91 [2023-12-18 21:19:45,444 INFO L226 Difference]: Without dead ends: 89 [2023-12-18 21:19:45,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:19:45,445 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:45,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 88 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:19:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-18 21:19:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2023-12-18 21:19:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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 21:19:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-12-18 21:19:45,455 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 22 [2023-12-18 21:19:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:45,455 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-12-18 21:19:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21:19:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-12-18 21:19:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 21:19:45,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:45,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:45,484 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 21:19:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:45,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -851477348, now seen corresponding path program 2 times [2023-12-18 21:19:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342306480] [2023-12-18 21:19:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:45,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:45,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785332955] [2023-12-18 21:19:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:19:45,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:45,706 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 21:19:45,744 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 21:19:45,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:19:45,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:45,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 21:19:45,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:19:45,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:19:45,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342306480] [2023-12-18 21:19:45,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785332955] [2023-12-18 21:19:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785332955] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:45,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-12-18 21:19:45,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422567681] [2023-12-18 21:19:45,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:19:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:19:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:19:45,879 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:19:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:46,118 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-12-18 21:19:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 21:19:46,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) Word has length 23 [2023-12-18 21:19:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:46,119 INFO L225 Difference]: With dead ends: 89 [2023-12-18 21:19:46,119 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 21:19:46,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:19:46,120 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:46,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:19:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 21:19:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2023-12-18 21:19:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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 21:19:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-12-18 21:19:46,133 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2023-12-18 21:19:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:46,134 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-12-18 21:19:46,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 21:19:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-12-18 21:19:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 21:19:46,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:46,135 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:46,159 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 21:19:46,340 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,SelfDestructingSolverStorable9 [2023-12-18 21:19:46,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:46,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1635002986, now seen corresponding path program 3 times [2023-12-18 21:19:46,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507930824] [2023-12-18 21:19:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:46,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:46,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185186498] [2023-12-18 21:19:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:19:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:46,372 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 21:19:46,373 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 21:19:46,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:19:46,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:46,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-18 21:19:46,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:46,742 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 11 treesize of output 7 [2023-12-18 21:19:46,749 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 21:19:46,758 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 21:19:46,788 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 19 treesize of output 18 [2023-12-18 21:19:46,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:46,855 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 26 treesize of output 28 [2023-12-18 21:19:46,989 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 19 treesize of output 18 [2023-12-18 21:19:47,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:47,033 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 30 treesize of output 21 [2023-12-18 21:19:47,122 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 25 treesize of output 20 [2023-12-18 21:19:47,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:47,161 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 40 treesize of output 34 [2023-12-18 21:19:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:19:47,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:19:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:19:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:19:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507930824] [2023-12-18 21:19:49,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:19:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185186498] [2023-12-18 21:19:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185186498] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:19:49,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:19:49,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2023-12-18 21:19:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904568476] [2023-12-18 21:19:49,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:19:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:19:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:19:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:19:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:19:49,255 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 21:19:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:19:58,620 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2023-12-18 21:19:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-18 21:19:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 25 [2023-12-18 21:19:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:19:58,621 INFO L225 Difference]: With dead ends: 77 [2023-12-18 21:19:58,621 INFO L226 Difference]: Without dead ends: 75 [2023-12-18 21:19:58,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=875, Invalid=3157, Unknown=0, NotChecked=0, Total=4032 [2023-12-18 21:19:58,623 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 231 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:19:58,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 127 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-18 21:19:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-18 21:19:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2023-12-18 21:19:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 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 21:19:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-12-18 21:19:58,644 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 25 [2023-12-18 21:19:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:19:58,645 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-12-18 21:19:58,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 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 21:19:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-12-18 21:19:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 21:19:58,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:19:58,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:19:58,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 21:19:58,851 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,SelfDestructingSolverStorable10 [2023-12-18 21:19:58,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:19:58,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:19:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash 951409372, now seen corresponding path program 4 times [2023-12-18 21:19:58,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:19:58,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429052300] [2023-12-18 21:19:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:19:58,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:19:58,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:19:58,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32532405] [2023-12-18 21:19:58,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:19:58,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:19:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:19:58,869 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 21:19:58,871 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 21:19:59,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:19:59,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:19:59,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-18 21:19:59,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:19:59,354 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 21:19:59,360 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 21:19:59,441 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 23 treesize of output 11 [2023-12-18 21:19:59,448 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 23 treesize of output 11 [2023-12-18 21:19:59,473 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 23 treesize of output 11 [2023-12-18 21:19:59,494 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 25 treesize of output 20 [2023-12-18 21:19:59,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:59,544 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 38 treesize of output 36 [2023-12-18 21:19:59,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:59,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 34 [2023-12-18 21:19:59,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:19:59,598 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 32 treesize of output 23 [2023-12-18 21:19:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:19:59,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:20:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 21:20:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:20:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429052300] [2023-12-18 21:20:01,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:20:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32532405] [2023-12-18 21:20:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32532405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:20:01,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:20:01,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-18 21:20:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453789635] [2023-12-18 21:20:01,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:20:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:20:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:20:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:20:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:20:01,889 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 21:20:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:20:08,902 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2023-12-18 21:20:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-18 21:20:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) Word has length 25 [2023-12-18 21:20:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:20:08,916 INFO L225 Difference]: With dead ends: 135 [2023-12-18 21:20:08,916 INFO L226 Difference]: Without dead ends: 133 [2023-12-18 21:20:08,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 21:20:08,917 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 217 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:20:08,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 132 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-18 21:20:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-18 21:20:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 72. [2023-12-18 21:20:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 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 21:20:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-12-18 21:20:08,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 25 [2023-12-18 21:20:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:20:08,983 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-12-18 21:20:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 21:20:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-12-18 21:20:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:20:08,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:20:08,988 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:20:08,995 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 21:20:09,194 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,SelfDestructingSolverStorable11 [2023-12-18 21:20:09,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:20:09,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:20:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash 325753559, now seen corresponding path program 5 times [2023-12-18 21:20:09,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:20:09,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534812113] [2023-12-18 21:20:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:20:09,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:20:09,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:20:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521780234] [2023-12-18 21:20:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:20:09,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:20:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:20:09,219 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 21:20:09,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 21:34:19,636 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 21:34:19,637 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 21:34:20,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-18 21:34:20,837 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2023-12-18 21:34:20,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-18 21:34:20,858 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 21:34:20,858 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2023-12-18 21:34:20,858 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,SelfDestructingSolverStorable12 [2023-12-18 21:34:20,858 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 7,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-18 21:34:20,861 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 1, 1, 1, 1] [2023-12-18 21:34:20,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 21:34:20,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 09:34:20 BoogieIcfgContainer [2023-12-18 21:34:20,868 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 21:34:20,868 INFO L158 Benchmark]: Toolchain (without parser) took 886026.57ms. Allocated memory was 184.5MB in the beginning and 329.3MB in the end (delta: 144.7MB). Free memory was 139.7MB in the beginning and 249.8MB in the end (delta: -110.0MB). Peak memory consumption was 35.6MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,868 INFO L158 Benchmark]: CDTParser took 0.59ms. Allocated memory is still 184.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:34:20,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.67ms. Allocated memory is still 184.5MB. Free memory was 139.7MB in the beginning and 128.0MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,869 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.15ms. Allocated memory is still 184.5MB. Free memory was 128.0MB in the beginning and 126.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,869 INFO L158 Benchmark]: Boogie Preprocessor took 38.05ms. Allocated memory is still 184.5MB. Free memory was 126.1MB in the beginning and 124.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,869 INFO L158 Benchmark]: RCFGBuilder took 381.26ms. Allocated memory is still 184.5MB. Free memory was 124.0MB in the beginning and 108.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,869 INFO L158 Benchmark]: TraceAbstraction took 885402.29ms. Allocated memory was 184.5MB in the beginning and 329.3MB in the end (delta: 144.7MB). Free memory was 107.6MB in the beginning and 249.8MB in the end (delta: -142.2MB). Peak memory consumption was 4.1MB. Max. memory is 8.0GB. [2023-12-18 21:34:20,872 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59ms. Allocated memory is still 184.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.67ms. Allocated memory is still 184.5MB. Free memory was 139.7MB in the beginning and 128.0MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.15ms. Allocated memory is still 184.5MB. Free memory was 128.0MB in the beginning and 126.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.05ms. Allocated memory is still 184.5MB. Free memory was 126.1MB in the beginning and 124.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 381.26ms. Allocated memory is still 184.5MB. Free memory was 124.0MB in the beginning and 108.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 885402.29ms. Allocated memory was 184.5MB in the beginning and 329.3MB in the end (delta: 144.7MB). Free memory was 107.6MB in the beginning and 249.8MB in the end (delta: -142.2MB). Peak memory consumption was 4.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was analyzing trace of length 27 with TraceHistMax 7,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 885.4s, OverallIterations: 13, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 20.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 996 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 996 mSDsluCounter, 746 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 602 mSDsCounter, 424 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1829 IncrementalHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 424 mSolverCounterUnsat, 144 mSDtfsCounter, 1829 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 231 SyntacticMatches, 9 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=12, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 261 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 372 ConstructedInterpolants, 8 QuantifiedInterpolants, 7841 SizeOfPredicates, 97 NumberOfNonLiveVariables, 1730 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 83/197 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown [2023-12-18 21:34:20,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 137