/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-patterns/array4_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:19:51,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:19:51,352 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:19:51,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:19:51,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:19:51,377 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:19:51,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:19:51,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:19:51,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:19:51,381 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:19:51,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:19:51,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:19:51,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:19:51,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:19:51,383 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:19:51,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:19:51,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:19:51,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:19:51,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:19:51,385 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:19:51,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:19:51,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:19:51,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:19:51,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:19:51,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:19:51,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:19:51,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:19:51,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:19:51,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:19:51,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:19:51,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:19:51,388 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:19:51,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:19:51,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:19:51,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:19:51,573 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:19:51,576 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:19:51,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array4_pattern.c [2023-12-16 00:19:52,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:19:52,705 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:19:52,706 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array4_pattern.c [2023-12-16 00:19:52,712 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc35c7cf/74897f017e814e53a216a5433c3654a9/FLAG9f5c0c8aa [2023-12-16 00:19:52,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc35c7cf/74897f017e814e53a216a5433c3654a9 [2023-12-16 00:19:52,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:19:52,729 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:19:52,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:19:52,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:19:52,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:19:52,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fd09cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52, skipping insertion in model container [2023-12-16 00:19:52,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,754 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:19:52,869 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-patterns/array4_pattern.c[1835,1848] [2023-12-16 00:19:52,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:19:52,902 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:19:52,910 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-patterns/array4_pattern.c[1835,1848] [2023-12-16 00:19:52,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:19:52,926 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:19:52,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52 WrapperNode [2023-12-16 00:19:52,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:19:52,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:19:52,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:19:52,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:19:52,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,936 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,948 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-12-16 00:19:52,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:19:52,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:19:52,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:19:52,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:19:52,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,980 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-12-16 00:19:52,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,981 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,987 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,988 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:19:52,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:19:52,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:19:52,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:19:52,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (1/1) ... [2023-12-16 00:19:52,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:19:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:53,013 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) [2023-12-16 00:19:53,014 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 [2023-12-16 00:19:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:19:53,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-16 00:19:53,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:19:53,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 00:19:53,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 00:19:53,088 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:19:53,089 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:19:53,262 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:19:53,279 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:19:53,279 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 00:19:53,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:19:53 BoogieIcfgContainer [2023-12-16 00:19:53,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:19:53,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:19:53,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:19:53,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:19:53,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:19:52" (1/3) ... [2023-12-16 00:19:53,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416f79ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:19:53, skipping insertion in model container [2023-12-16 00:19:53,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:52" (2/3) ... [2023-12-16 00:19:53,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416f79ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:19:53, skipping insertion in model container [2023-12-16 00:19:53,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:19:53" (3/3) ... [2023-12-16 00:19:53,285 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-12-16 00:19:53,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:19:53,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 00:19:53,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:19:53,336 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;@1f700ace, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:19:53,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 00:19:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:19:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-16 00:19:53,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:53,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:53,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:53,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash -661786546, now seen corresponding path program 1 times [2023-12-16 00:19:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:53,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347982962] [2023-12-16 00:19:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:53,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-16 00:19:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:19:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347982962] [2023-12-16 00:19:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347982962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:19:53,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:19:53,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:19:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794566622] [2023-12-16 00:19:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:19:53,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 00:19:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 00:19:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:19:53,535 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 00:19:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:53,561 INFO L93 Difference]: Finished difference Result 54 states and 84 transitions. [2023-12-16 00:19:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 00:19:53,563 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-16 00:19:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:53,567 INFO L225 Difference]: With dead ends: 54 [2023-12-16 00:19:53,567 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 00:19:53,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:19:53,571 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:53,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:19:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 00:19:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 00:19:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:19:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-16 00:19:53,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2023-12-16 00:19:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:53,595 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-16 00:19:53,596 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 00:19:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-16 00:19:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-16 00:19:53,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:53,597 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 00:19:53,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:53,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash -41868004, now seen corresponding path program 1 times [2023-12-16 00:19:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126636865] [2023-12-16 00:19:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:53,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:53,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428963933] [2023-12-16 00:19:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:53,635 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) [2023-12-16 00:19:53,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:19:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:53,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-16 00:19:53,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:19:53,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:19:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126636865] [2023-12-16 00:19:53,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:53,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428963933] [2023-12-16 00:19:53,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428963933] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:19:53,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:19:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:19:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568311780] [2023-12-16 00:19:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:19:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:19:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:19:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:19:53,784 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:53,827 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-12-16 00:19:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:19:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-12-16 00:19:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:53,830 INFO L225 Difference]: With dead ends: 64 [2023-12-16 00:19:53,830 INFO L226 Difference]: Without dead ends: 43 [2023-12-16 00:19:53,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:19:53,833 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:53,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:19:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-16 00:19:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-12-16 00:19:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 00:19:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2023-12-16 00:19:53,849 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 41 [2023-12-16 00:19:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:53,850 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2023-12-16 00:19:53,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2023-12-16 00:19:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-16 00:19:53,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:53,851 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:53,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:54,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:54,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -851214630, now seen corresponding path program 1 times [2023-12-16 00:19:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:54,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120384711] [2023-12-16 00:19:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:54,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237868807] [2023-12-16 00:19:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:54,091 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) [2023-12-16 00:19:54,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:19:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:54,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 00:19:54,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:19:54,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:19:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120384711] [2023-12-16 00:19:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237868807] [2023-12-16 00:19:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237868807] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:19:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:19:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:19:54,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680902278] [2023-12-16 00:19:54,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:19:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:19:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:19:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:19:54,223 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:54,247 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-12-16 00:19:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:19:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-12-16 00:19:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:54,249 INFO L225 Difference]: With dead ends: 40 [2023-12-16 00:19:54,249 INFO L226 Difference]: Without dead ends: 36 [2023-12-16 00:19:54,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:19:54,251 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:54,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:19:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-16 00:19:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-16 00:19:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 00:19:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-12-16 00:19:54,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 41 [2023-12-16 00:19:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:54,259 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-12-16 00:19:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-12-16 00:19:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-16 00:19:54,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:54,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:54,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:54,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-16 00:19:54,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:54,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -585767715, now seen corresponding path program 1 times [2023-12-16 00:19:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935907397] [2023-12-16 00:19:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:54,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:54,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59414036] [2023-12-16 00:19:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:54,483 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) [2023-12-16 00:19:54,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:19:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:54,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-16 00:19:54,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:19:54,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 00:19:54,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935907397] [2023-12-16 00:19:54,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59414036] [2023-12-16 00:19:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59414036] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:19:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:19:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:19:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380283349] [2023-12-16 00:19:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:19:54,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:19:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:19:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:19:54,620 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:54,676 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2023-12-16 00:19:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 00:19:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-12-16 00:19:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:54,677 INFO L225 Difference]: With dead ends: 71 [2023-12-16 00:19:54,677 INFO L226 Difference]: Without dead ends: 38 [2023-12-16 00:19:54,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:19:54,678 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:54,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:19:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-16 00:19:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-12-16 00:19:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 00:19:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-12-16 00:19:54,683 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 42 [2023-12-16 00:19:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-12-16 00:19:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-16 00:19:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-12-16 00:19:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-16 00:19:54,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:54,684 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:54,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:54,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:54,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -329442725, now seen corresponding path program 1 times [2023-12-16 00:19:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:54,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353538452] [2023-12-16 00:19:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:54,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16816406] [2023-12-16 00:19:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:54,913 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) [2023-12-16 00:19:54,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:19:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:19:54,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-16 00:19:54,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:55,053 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 [2023-12-16 00:19:55,573 INFO L349 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-12-16 00:19:55,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 27 [2023-12-16 00:19:55,580 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 [2023-12-16 00:19:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:19:55,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:19:55,734 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 33 treesize of output 31 [2023-12-16 00:19:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2023-12-16 00:19:55,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:55,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353538452] [2023-12-16 00:19:55,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:55,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16816406] [2023-12-16 00:19:55,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16816406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:19:55,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:19:55,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-16 00:19:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992969399] [2023-12-16 00:19:55,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:19:55,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-16 00:19:55,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-16 00:19:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-12-16 00:19:55,873 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 00:19:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:56,376 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2023-12-16 00:19:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-16 00:19:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2023-12-16 00:19:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:56,377 INFO L225 Difference]: With dead ends: 77 [2023-12-16 00:19:56,377 INFO L226 Difference]: Without dead ends: 73 [2023-12-16 00:19:56,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2023-12-16 00:19:56,378 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:56,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 175 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 00:19:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-16 00:19:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2023-12-16 00:19:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-16 00:19:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-12-16 00:19:56,391 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 43 [2023-12-16 00:19:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:56,392 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-12-16 00:19:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 00:19:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-12-16 00:19:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-16 00:19:56,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:56,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:56,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:56,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:56,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1590707844, now seen corresponding path program 2 times [2023-12-16 00:19:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:56,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439896179] [2023-12-16 00:19:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:56,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:56,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803104811] [2023-12-16 00:19:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:19:56,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:56,617 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) [2023-12-16 00:19:56,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:19:56,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:19:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:19:56,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-16 00:19:56,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:19:56,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:19:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:19:56,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439896179] [2023-12-16 00:19:56,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803104811] [2023-12-16 00:19:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803104811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:19:56,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:19:56,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-16 00:19:56,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280451636] [2023-12-16 00:19:56,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:19:56,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-16 00:19:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-16 00:19:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-16 00:19:56,775 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:19:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:56,882 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2023-12-16 00:19:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 00:19:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-12-16 00:19:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:56,883 INFO L225 Difference]: With dead ends: 140 [2023-12-16 00:19:56,883 INFO L226 Difference]: Without dead ends: 115 [2023-12-16 00:19:56,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-16 00:19:56,884 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:56,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 128 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:19:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-16 00:19:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2023-12-16 00:19:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-16 00:19:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-12-16 00:19:56,896 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 44 [2023-12-16 00:19:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:56,896 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-12-16 00:19:56,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:19:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-12-16 00:19:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-16 00:19:56,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:56,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:56,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:57,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:57,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash -973302627, now seen corresponding path program 3 times [2023-12-16 00:19:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:57,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9438761] [2023-12-16 00:19:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:57,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:57,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204046804] [2023-12-16 00:19:57,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:19:57,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:57,127 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) [2023-12-16 00:19:57,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:19:57,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-16 00:19:57,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:19:57,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-16 00:19:57,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:57,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 00:19:57,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-16 00:19:57,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:19:57,462 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 27 treesize of output 23 [2023-12-16 00:19:57,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:19:57,470 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 26 treesize of output 22 [2023-12-16 00:19:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 00:19:57,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:19:57,588 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 33 treesize of output 31 [2023-12-16 00:19:57,590 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 31 treesize of output 29 [2023-12-16 00:19:57,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2023-12-16 00:19:57,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2023-12-16 00:19:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-16 00:19:57,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:19:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9438761] [2023-12-16 00:19:57,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:19:57,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204046804] [2023-12-16 00:19:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204046804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:19:57,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:19:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-16 00:19:57,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726260846] [2023-12-16 00:19:57,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:19:57,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-16 00:19:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:19:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-16 00:19:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-12-16 00:19:57,815 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-16 00:19:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:19:58,614 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2023-12-16 00:19:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-16 00:19:58,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 44 [2023-12-16 00:19:58,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:19:58,615 INFO L225 Difference]: With dead ends: 130 [2023-12-16 00:19:58,615 INFO L226 Difference]: Without dead ends: 71 [2023-12-16 00:19:58,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2023-12-16 00:19:58,617 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 00:19:58,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 00:19:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-16 00:19:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2023-12-16 00:19:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-16 00:19:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-12-16 00:19:58,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 44 [2023-12-16 00:19:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:19:58,627 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-12-16 00:19:58,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-16 00:19:58,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-12-16 00:19:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-16 00:19:58,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:19:58,627 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:19:58,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:19:58,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:58,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:19:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:19:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash -75528326, now seen corresponding path program 4 times [2023-12-16 00:19:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:19:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575488704] [2023-12-16 00:19:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:19:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:19:58,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:19:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110678901] [2023-12-16 00:19:58,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:19:58,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:19:58,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:19:58,846 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) [2023-12-16 00:19:58,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:19:58,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:19:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:19:58,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-16 00:19:58,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:19:58,944 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 [2023-12-16 00:19:58,947 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 [2023-12-16 00:19:58,967 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 [2023-12-16 00:19:58,979 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 [2023-12-16 00:19:59,651 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-12-16 00:19:59,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2023-12-16 00:19:59,698 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-12-16 00:19:59,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2023-12-16 00:19:59,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:19:59,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2023-12-16 00:19:59,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:19:59,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2023-12-16 00:19:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-16 00:19:59,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575488704] [2023-12-16 00:20:00,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110678901] [2023-12-16 00:20:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110678901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:00,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:00,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-16 00:20:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541984122] [2023-12-16 00:20:00,267 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 00:20:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 00:20:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-12-16 00:20:00,268 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 00:20:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:00,615 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2023-12-16 00:20:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-16 00:20:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2023-12-16 00:20:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:00,617 INFO L225 Difference]: With dead ends: 89 [2023-12-16 00:20:00,617 INFO L226 Difference]: Without dead ends: 85 [2023-12-16 00:20:00,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-12-16 00:20:00,618 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:00,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:20:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-16 00:20:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2023-12-16 00:20:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-16 00:20:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-12-16 00:20:00,629 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 45 [2023-12-16 00:20:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:00,629 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-12-16 00:20:00,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 00:20:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-12-16 00:20:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-16 00:20:00,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:00,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:00,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:00,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:00,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:00,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1985671229, now seen corresponding path program 5 times [2023-12-16 00:20:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:00,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730502221] [2023-12-16 00:20:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:00,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89207966] [2023-12-16 00:20:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:20:00,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:00,866 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) [2023-12-16 00:20:00,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:20:00,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-16 00:20:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:00,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 00:20:00,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:00,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:01,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730502221] [2023-12-16 00:20:01,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:01,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89207966] [2023-12-16 00:20:01,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89207966] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:01,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-16 00:20:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765154907] [2023-12-16 00:20:01,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:01,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 00:20:01,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 00:20:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-16 00:20:01,030 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:01,273 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2023-12-16 00:20:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 00:20:01,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2023-12-16 00:20:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:01,274 INFO L225 Difference]: With dead ends: 178 [2023-12-16 00:20:01,274 INFO L226 Difference]: Without dead ends: 140 [2023-12-16 00:20:01,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-16 00:20:01,275 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:01,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 191 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:20:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-16 00:20:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2023-12-16 00:20:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.127906976744186) internal successors, (97), 87 states have internal predecessors, (97), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-16 00:20:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2023-12-16 00:20:01,295 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 46 [2023-12-16 00:20:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:01,295 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2023-12-16 00:20:01,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2023-12-16 00:20:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-16 00:20:01,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:01,296 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:01,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:01,500 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,SelfDestructingSolverStorable8 [2023-12-16 00:20:01,500 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:01,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash -349603524, now seen corresponding path program 6 times [2023-12-16 00:20:01,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:01,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21259326] [2023-12-16 00:20:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:01,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:01,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780320818] [2023-12-16 00:20:01,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:20:01,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:01,524 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) [2023-12-16 00:20:01,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-16 00:20:01,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-16 00:20:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:01,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:20:01,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:01,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:01,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21259326] [2023-12-16 00:20:01,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780320818] [2023-12-16 00:20:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780320818] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:01,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:01,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-16 00:20:01,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942323953] [2023-12-16 00:20:01,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 00:20:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 00:20:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-16 00:20:01,781 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:02,171 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2023-12-16 00:20:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 00:20:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2023-12-16 00:20:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:02,172 INFO L225 Difference]: With dead ends: 138 [2023-12-16 00:20:02,172 INFO L226 Difference]: Without dead ends: 134 [2023-12-16 00:20:02,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-12-16 00:20:02,173 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 71 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:02,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 220 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 00:20:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-16 00:20:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2023-12-16 00:20:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 88 states have internal predecessors, (98), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-16 00:20:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2023-12-16 00:20:02,196 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 46 [2023-12-16 00:20:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:02,196 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2023-12-16 00:20:02,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2023-12-16 00:20:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-16 00:20:02,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:02,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:02,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 00:20:02,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:02,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2079274683, now seen corresponding path program 7 times [2023-12-16 00:20:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:02,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24588640] [2023-12-16 00:20:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:02,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:02,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24981643] [2023-12-16 00:20:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 00:20:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:02,420 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) [2023-12-16 00:20:02,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-16 00:20:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:20:02,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-16 00:20:02,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:02,545 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 [2023-12-16 00:20:02,552 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 [2023-12-16 00:20:02,580 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 [2023-12-16 00:20:02,588 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 [2023-12-16 00:20:02,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:02,632 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 [2023-12-16 00:20:02,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:02,644 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 [2023-12-16 00:20:03,865 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2023-12-16 00:20:03,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2023-12-16 00:20:03,970 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2023-12-16 00:20:03,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2023-12-16 00:20:04,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:04,529 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 96 treesize of output 52 [2023-12-16 00:20:04,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:04,533 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 147 treesize of output 79 [2023-12-16 00:20:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:20:04,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:05,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:05,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24588640] [2023-12-16 00:20:05,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:05,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24981643] [2023-12-16 00:20:05,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24981643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:05,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:05,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-16 00:20:05,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048341364] [2023-12-16 00:20:05,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:05,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-16 00:20:05,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:05,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-16 00:20:05,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2023-12-16 00:20:05,073 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:06,350 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2023-12-16 00:20:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-16 00:20:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2023-12-16 00:20:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:06,352 INFO L225 Difference]: With dead ends: 163 [2023-12-16 00:20:06,352 INFO L226 Difference]: Without dead ends: 159 [2023-12-16 00:20:06,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2023-12-16 00:20:06,353 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 104 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:06,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 211 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 00:20:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-16 00:20:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2023-12-16 00:20:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 102 states have internal predecessors, (114), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-16 00:20:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2023-12-16 00:20:06,375 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 47 [2023-12-16 00:20:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:06,376 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2023-12-16 00:20:06,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2023-12-16 00:20:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-16 00:20:06,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:06,376 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:06,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:06,578 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,SelfDestructingSolverStorable10 [2023-12-16 00:20:06,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:06,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash 65087772, now seen corresponding path program 8 times [2023-12-16 00:20:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654433435] [2023-12-16 00:20:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:06,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467073770] [2023-12-16 00:20:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:20:06,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:06,598 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) [2023-12-16 00:20:06,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-16 00:20:06,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:20:06,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:06,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 00:20:06,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:06,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:06,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:06,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654433435] [2023-12-16 00:20:06,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:06,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467073770] [2023-12-16 00:20:06,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467073770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:06,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:06,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-16 00:20:06,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261496952] [2023-12-16 00:20:06,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:06,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 00:20:06,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 00:20:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-16 00:20:06,796 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:07,127 INFO L93 Difference]: Finished difference Result 345 states and 454 transitions. [2023-12-16 00:20:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-16 00:20:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-12-16 00:20:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:07,130 INFO L225 Difference]: With dead ends: 345 [2023-12-16 00:20:07,130 INFO L226 Difference]: Without dead ends: 253 [2023-12-16 00:20:07,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2023-12-16 00:20:07,134 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 234 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:07,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 198 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:20:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-12-16 00:20:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 215. [2023-12-16 00:20:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 146 states have (on average 1.13013698630137) internal successors, (165), 147 states have internal predecessors, (165), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-16 00:20:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 287 transitions. [2023-12-16 00:20:07,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 287 transitions. Word has length 48 [2023-12-16 00:20:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:07,181 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 287 transitions. [2023-12-16 00:20:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 287 transitions. [2023-12-16 00:20:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-16 00:20:07,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:07,182 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:07,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:07,386 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,SelfDestructingSolverStorable11 [2023-12-16 00:20:07,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:07,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash 686014461, now seen corresponding path program 9 times [2023-12-16 00:20:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771211591] [2023-12-16 00:20:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:07,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:07,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218205393] [2023-12-16 00:20:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:20:07,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:07,397 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) [2023-12-16 00:20:07,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 00:20:07,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-16 00:20:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:07,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 00:20:07,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:07,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771211591] [2023-12-16 00:20:07,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218205393] [2023-12-16 00:20:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218205393] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:07,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-16 00:20:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502776788] [2023-12-16 00:20:07,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 00:20:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 00:20:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-16 00:20:07,602 INFO L87 Difference]: Start difference. First operand 215 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:08,014 INFO L93 Difference]: Finished difference Result 239 states and 309 transitions. [2023-12-16 00:20:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 00:20:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-12-16 00:20:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:08,015 INFO L225 Difference]: With dead ends: 239 [2023-12-16 00:20:08,016 INFO L226 Difference]: Without dead ends: 235 [2023-12-16 00:20:08,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-12-16 00:20:08,016 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:08,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 395 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 00:20:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-12-16 00:20:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 216. [2023-12-16 00:20:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 147 states have (on average 1.129251700680272) internal successors, (166), 148 states have internal predecessors, (166), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-16 00:20:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2023-12-16 00:20:08,055 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 48 [2023-12-16 00:20:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:08,055 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2023-12-16 00:20:08,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2023-12-16 00:20:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-16 00:20:08,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:08,056 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:08,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:08,261 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,SelfDestructingSolverStorable12 [2023-12-16 00:20:08,261 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:08,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash -176306150, now seen corresponding path program 10 times [2023-12-16 00:20:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:08,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722749674] [2023-12-16 00:20:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:08,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:08,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144744159] [2023-12-16 00:20:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:20:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:08,273 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) [2023-12-16 00:20:08,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-16 00:20:08,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:20:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:08,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-16 00:20:08,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:08,420 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 [2023-12-16 00:20:08,430 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 [2023-12-16 00:20:08,447 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 [2023-12-16 00:20:08,457 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 [2023-12-16 00:20:08,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:08,491 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 [2023-12-16 00:20:08,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:08,501 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 [2023-12-16 00:20:08,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:08,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:08,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:08,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:09,898 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2023-12-16 00:20:09,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2023-12-16 00:20:10,035 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2023-12-16 00:20:10,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2023-12-16 00:20:11,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:11,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 84 [2023-12-16 00:20:11,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:11,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 127 [2023-12-16 00:20:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:11,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722749674] [2023-12-16 00:20:12,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144744159] [2023-12-16 00:20:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144744159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:12,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:12,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-16 00:20:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866496893] [2023-12-16 00:20:12,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-16 00:20:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-16 00:20:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-12-16 00:20:12,477 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:13,242 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2023-12-16 00:20:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-16 00:20:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2023-12-16 00:20:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:13,243 INFO L225 Difference]: With dead ends: 254 [2023-12-16 00:20:13,243 INFO L226 Difference]: Without dead ends: 250 [2023-12-16 00:20:13,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=286, Invalid=1694, Unknown=0, NotChecked=0, Total=1980 [2023-12-16 00:20:13,244 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:13,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 00:20:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-16 00:20:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 235. [2023-12-16 00:20:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 162 states have internal predecessors, (182), 65 states have call successors, (65), 8 states have call predecessors, (65), 8 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-12-16 00:20:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2023-12-16 00:20:13,287 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 49 [2023-12-16 00:20:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:13,287 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2023-12-16 00:20:13,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2023-12-16 00:20:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 00:20:13,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:13,288 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:13,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-16 00:20:13,492 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,SelfDestructingSolverStorable13 [2023-12-16 00:20:13,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:13,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1138441315, now seen corresponding path program 11 times [2023-12-16 00:20:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474158136] [2023-12-16 00:20:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:13,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:13,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754773092] [2023-12-16 00:20:13,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:20:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:13,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:13,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-16 00:20:13,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-16 00:20:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:13,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:20:13,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:13,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474158136] [2023-12-16 00:20:13,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754773092] [2023-12-16 00:20:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754773092] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:13,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:13,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-16 00:20:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724741123] [2023-12-16 00:20:13,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 00:20:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 00:20:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-16 00:20:13,771 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:14,362 INFO L93 Difference]: Finished difference Result 588 states and 785 transitions. [2023-12-16 00:20:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-16 00:20:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-12-16 00:20:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:14,365 INFO L225 Difference]: With dead ends: 588 [2023-12-16 00:20:14,365 INFO L226 Difference]: Without dead ends: 422 [2023-12-16 00:20:14,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2023-12-16 00:20:14,366 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 404 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:14,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 271 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 00:20:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-12-16 00:20:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 327. [2023-12-16 00:20:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 220 states have (on average 1.1318181818181818) internal successors, (249), 221 states have internal predecessors, (249), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2023-12-16 00:20:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 443 transitions. [2023-12-16 00:20:14,438 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 443 transitions. Word has length 50 [2023-12-16 00:20:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:14,438 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 443 transitions. [2023-12-16 00:20:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 443 transitions. [2023-12-16 00:20:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 00:20:14,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:14,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:14,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:14,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:14,646 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:14,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 930416860, now seen corresponding path program 12 times [2023-12-16 00:20:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:14,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124052169] [2023-12-16 00:20:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:14,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:14,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:14,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337427361] [2023-12-16 00:20:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:20:14,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:14,661 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:14,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-16 00:20:14,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-16 00:20:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:14,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-16 00:20:14,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:15,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:15,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124052169] [2023-12-16 00:20:15,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:15,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337427361] [2023-12-16 00:20:15,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337427361] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:15,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:15,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-16 00:20:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438527244] [2023-12-16 00:20:15,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:15,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 00:20:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 00:20:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-16 00:20:15,072 INFO L87 Difference]: Start difference. First operand 327 states and 443 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:15,580 INFO L93 Difference]: Finished difference Result 365 states and 478 transitions. [2023-12-16 00:20:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 00:20:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-12-16 00:20:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:15,582 INFO L225 Difference]: With dead ends: 365 [2023-12-16 00:20:15,582 INFO L226 Difference]: Without dead ends: 361 [2023-12-16 00:20:15,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2023-12-16 00:20:15,583 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 143 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:15,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 446 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 00:20:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-12-16 00:20:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2023-12-16 00:20:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 222 states have internal predecessors, (250), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2023-12-16 00:20:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 444 transitions. [2023-12-16 00:20:15,653 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 444 transitions. Word has length 50 [2023-12-16 00:20:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:15,653 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 444 transitions. [2023-12-16 00:20:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 444 transitions. [2023-12-16 00:20:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-16 00:20:15,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:15,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:15,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-16 00:20:15,856 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:15,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1189766373, now seen corresponding path program 13 times [2023-12-16 00:20:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981160] [2023-12-16 00:20:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:15,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:15,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46661733] [2023-12-16 00:20:15,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 00:20:15,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:15,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:15,875 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:15,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-16 00:20:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:20:16,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-16 00:20:16,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:16,063 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 [2023-12-16 00:20:16,066 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 [2023-12-16 00:20:16,096 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 [2023-12-16 00:20:16,101 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 [2023-12-16 00:20:16,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,143 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 [2023-12-16 00:20:16,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,156 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 [2023-12-16 00:20:16,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:16,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:16,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-16 00:20:16,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:16,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-16 00:20:18,100 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2023-12-16 00:20:18,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2023-12-16 00:20:18,251 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2023-12-16 00:20:18,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2023-12-16 00:20:20,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:20,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 113 [2023-12-16 00:20:20,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:20,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 279 treesize of output 163 [2023-12-16 00:20:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-16 00:20:20,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:21,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:21,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981160] [2023-12-16 00:20:21,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46661733] [2023-12-16 00:20:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46661733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:21,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:21,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-12-16 00:20:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123483433] [2023-12-16 00:20:21,094 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:21,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-16 00:20:21,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-16 00:20:21,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2023-12-16 00:20:21,096 INFO L87 Difference]: Start difference. First operand 328 states and 444 transitions. Second operand has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:23,954 INFO L93 Difference]: Finished difference Result 369 states and 494 transitions. [2023-12-16 00:20:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-16 00:20:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2023-12-16 00:20:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:23,956 INFO L225 Difference]: With dead ends: 369 [2023-12-16 00:20:23,956 INFO L226 Difference]: Without dead ends: 365 [2023-12-16 00:20:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=391, Invalid=3269, Unknown=0, NotChecked=0, Total=3660 [2023-12-16 00:20:23,958 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 312 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-16 00:20:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-16 00:20:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 347. [2023-12-16 00:20:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 236 states have internal predecessors, (266), 101 states have call successors, (101), 10 states have call predecessors, (101), 10 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-16 00:20:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 468 transitions. [2023-12-16 00:20:24,036 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 468 transitions. Word has length 51 [2023-12-16 00:20:24,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:24,036 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 468 transitions. [2023-12-16 00:20:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 468 transitions. [2023-12-16 00:20:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-16 00:20:24,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:24,038 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:24,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-16 00:20:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-16 00:20:24,243 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:24,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1804030140, now seen corresponding path program 14 times [2023-12-16 00:20:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:24,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606463541] [2023-12-16 00:20:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:24,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300600812] [2023-12-16 00:20:24,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 00:20:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:24,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:24,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:24,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-16 00:20:24,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 00:20:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:24,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-16 00:20:24,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:24,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:24,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:24,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606463541] [2023-12-16 00:20:24,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300600812] [2023-12-16 00:20:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300600812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:24,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:24,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-16 00:20:24,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366336702] [2023-12-16 00:20:24,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:24,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 00:20:24,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:24,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 00:20:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-16 00:20:24,525 INFO L87 Difference]: Start difference. First operand 347 states and 468 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:25,346 INFO L93 Difference]: Finished difference Result 907 states and 1222 transitions. [2023-12-16 00:20:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-16 00:20:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-12-16 00:20:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:25,349 INFO L225 Difference]: With dead ends: 907 [2023-12-16 00:20:25,349 INFO L226 Difference]: Without dead ends: 645 [2023-12-16 00:20:25,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2023-12-16 00:20:25,351 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 659 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:25,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 372 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 00:20:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2023-12-16 00:20:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 461. [2023-12-16 00:20:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 308 states have (on average 1.1331168831168832) internal successors, (349), 309 states have internal predecessors, (349), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-12-16 00:20:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 631 transitions. [2023-12-16 00:20:25,454 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 631 transitions. Word has length 52 [2023-12-16 00:20:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:25,455 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 631 transitions. [2023-12-16 00:20:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 631 transitions. [2023-12-16 00:20:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-16 00:20:25,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:25,455 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:25,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-16 00:20:25,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-16 00:20:25,660 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:25,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1514124125, now seen corresponding path program 15 times [2023-12-16 00:20:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:25,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38873576] [2023-12-16 00:20:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:25,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:25,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561955104] [2023-12-16 00:20:25,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 00:20:25,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:25,680 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:25,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-16 00:20:25,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-16 00:20:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:25,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-16 00:20:25,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:25,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:25,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38873576] [2023-12-16 00:20:25,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561955104] [2023-12-16 00:20:25,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561955104] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:25,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:25,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-16 00:20:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29033735] [2023-12-16 00:20:25,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 00:20:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 00:20:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-16 00:20:25,991 INFO L87 Difference]: Start difference. First operand 461 states and 631 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:26,980 INFO L93 Difference]: Finished difference Result 516 states and 682 transitions. [2023-12-16 00:20:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 00:20:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-12-16 00:20:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:26,982 INFO L225 Difference]: With dead ends: 516 [2023-12-16 00:20:26,982 INFO L226 Difference]: Without dead ends: 512 [2023-12-16 00:20:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-12-16 00:20:26,983 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 144 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:26,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 847 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-16 00:20:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-12-16 00:20:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 462. [2023-12-16 00:20:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 309 states have (on average 1.132686084142395) internal successors, (350), 310 states have internal predecessors, (350), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-12-16 00:20:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 632 transitions. [2023-12-16 00:20:27,091 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 632 transitions. Word has length 52 [2023-12-16 00:20:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:27,091 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 632 transitions. [2023-12-16 00:20:27,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 632 transitions. [2023-12-16 00:20:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-16 00:20:27,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:27,093 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:27,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:27,298 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash -274710342, now seen corresponding path program 16 times [2023-12-16 00:20:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:27,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670198281] [2023-12-16 00:20:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:27,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439108038] [2023-12-16 00:20:27,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 00:20:27,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:27,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:27,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:27,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-16 00:20:27,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 00:20:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:27,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-16 00:20:27,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:27,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 00:20:27,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 00:20:27,638 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 27 treesize of output 26 [2023-12-16 00:20:27,648 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 27 treesize of output 26 [2023-12-16 00:20:27,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,682 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 40 [2023-12-16 00:20:27,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,695 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 40 [2023-12-16 00:20:27,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 54 [2023-12-16 00:20:27,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 54 [2023-12-16 00:20:27,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-12-16 00:20:27,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-12-16 00:20:27,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2023-12-16 00:20:27,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:27,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2023-12-16 00:20:31,204 INFO L349 Elim1Store]: treesize reduction 624, result has 31.2 percent of original size [2023-12-16 00:20:31,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 212 treesize of output 348 [2023-12-16 00:20:31,657 INFO L349 Elim1Store]: treesize reduction 588, result has 32.5 percent of original size [2023-12-16 00:20:31,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 212 treesize of output 346 [2023-12-16 00:20:36,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:36,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2023-12-16 00:20:36,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:36,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 399 treesize of output 223 [2023-12-16 00:20:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-16 00:20:36,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:38,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670198281] [2023-12-16 00:20:38,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439108038] [2023-12-16 00:20:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439108038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:38,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-12-16 00:20:38,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32819637] [2023-12-16 00:20:38,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:38,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-16 00:20:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-16 00:20:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2023-12-16 00:20:38,835 INFO L87 Difference]: Start difference. First operand 462 states and 632 transitions. Second operand has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:41,469 INFO L93 Difference]: Finished difference Result 508 states and 686 transitions. [2023-12-16 00:20:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-16 00:20:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2023-12-16 00:20:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:41,471 INFO L225 Difference]: With dead ends: 508 [2023-12-16 00:20:41,471 INFO L226 Difference]: Without dead ends: 504 [2023-12-16 00:20:41,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=358, Invalid=2612, Unknown=0, NotChecked=0, Total=2970 [2023-12-16 00:20:41,472 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:41,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 356 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-16 00:20:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-12-16 00:20:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 485. [2023-12-16 00:20:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 326 states have (on average 1.1319018404907975) internal successors, (369), 327 states have internal predecessors, (369), 145 states have call successors, (145), 13 states have call predecessors, (145), 13 states have return successors, (145), 144 states have call predecessors, (145), 145 states have call successors, (145) [2023-12-16 00:20:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 659 transitions. [2023-12-16 00:20:41,580 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 659 transitions. Word has length 53 [2023-12-16 00:20:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:41,580 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 659 transitions. [2023-12-16 00:20:41,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 00:20:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 659 transitions. [2023-12-16 00:20:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-16 00:20:41,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:41,581 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:41,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:41,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:41,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash 105996029, now seen corresponding path program 17 times [2023-12-16 00:20:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736889194] [2023-12-16 00:20:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:41,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:41,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634014618] [2023-12-16 00:20:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-16 00:20:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:41,800 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:41,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-16 00:20:41,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-16 00:20:41,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:41,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-16 00:20:41,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:42,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736889194] [2023-12-16 00:20:42,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634014618] [2023-12-16 00:20:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634014618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:42,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:42,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-16 00:20:42,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214043301] [2023-12-16 00:20:42,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:42,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-16 00:20:42,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:42,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-16 00:20:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-16 00:20:42,225 INFO L87 Difference]: Start difference. First operand 485 states and 659 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:43,618 INFO L93 Difference]: Finished difference Result 1307 states and 1769 transitions. [2023-12-16 00:20:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-16 00:20:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2023-12-16 00:20:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:43,621 INFO L225 Difference]: With dead ends: 1307 [2023-12-16 00:20:43,621 INFO L226 Difference]: Without dead ends: 927 [2023-12-16 00:20:43,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=648, Invalid=2108, Unknown=0, NotChecked=0, Total=2756 [2023-12-16 00:20:43,623 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 621 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:43,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 617 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-16 00:20:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2023-12-16 00:20:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 621. [2023-12-16 00:20:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 413 states have (on average 1.1331719128329298) internal successors, (468), 414 states have internal predecessors, (468), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2023-12-16 00:20:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 854 transitions. [2023-12-16 00:20:43,760 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 854 transitions. Word has length 54 [2023-12-16 00:20:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:43,761 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 854 transitions. [2023-12-16 00:20:43,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 854 transitions. [2023-12-16 00:20:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-16 00:20:43,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:43,761 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:43,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:43,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-16 00:20:43,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:43,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash -291155844, now seen corresponding path program 18 times [2023-12-16 00:20:43,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:43,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256056897] [2023-12-16 00:20:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:43,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:43,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023221563] [2023-12-16 00:20:43,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-16 00:20:43,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:43,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:43,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:44,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-16 00:20:44,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-16 00:20:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 00:20:44,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-16 00:20:44,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 00:20:44,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-16 00:20:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256056897] [2023-12-16 00:20:44,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023221563] [2023-12-16 00:20:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023221563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:20:44,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 00:20:44,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-16 00:20:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208277529] [2023-12-16 00:20:44,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:44,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-16 00:20:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-16 00:20:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-16 00:20:44,648 INFO L87 Difference]: Start difference. First operand 621 states and 854 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:20:45,815 INFO L93 Difference]: Finished difference Result 696 states and 924 transitions. [2023-12-16 00:20:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-16 00:20:45,817 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2023-12-16 00:20:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:20:45,819 INFO L225 Difference]: With dead ends: 696 [2023-12-16 00:20:45,819 INFO L226 Difference]: Without dead ends: 692 [2023-12-16 00:20:45,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-12-16 00:20:45,822 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 195 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:20:45,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 741 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-16 00:20:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-12-16 00:20:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 622. [2023-12-16 00:20:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 415 states have internal predecessors, (469), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2023-12-16 00:20:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 855 transitions. [2023-12-16 00:20:45,962 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 855 transitions. Word has length 54 [2023-12-16 00:20:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:20:45,963 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 855 transitions. [2023-12-16 00:20:45,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-16 00:20:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 855 transitions. [2023-12-16 00:20:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-16 00:20:45,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:20:45,963 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:20:45,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-16 00:20:46,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-16 00:20:46,170 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:20:46,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:20:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash -403814533, now seen corresponding path program 19 times [2023-12-16 00:20:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:20:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412032740] [2023-12-16 00:20:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:20:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:20:46,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 00:20:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715565449] [2023-12-16 00:20:46,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-16 00:20:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:20:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:20:46,183 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 00:20:46,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-16 00:20:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:20:46,419 WARN L260 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 124 conjunts are in the unsatisfiable core [2023-12-16 00:20:46,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:20:46,457 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 [2023-12-16 00:20:46,462 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 [2023-12-16 00:20:46,487 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 [2023-12-16 00:20:46,495 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 [2023-12-16 00:20:46,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,535 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 [2023-12-16 00:20:46,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,544 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 26 treesize of output 28 [2023-12-16 00:20:46,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:46,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-16 00:20:46,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-16 00:20:46,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-16 00:20:46,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-16 00:20:46,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-16 00:20:46,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-16 00:20:46,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:46,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-16 00:20:49,593 INFO L349 Elim1Store]: treesize reduction 280, result has 35.6 percent of original size [2023-12-16 00:20:49,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 206 [2023-12-16 00:20:49,843 INFO L349 Elim1Store]: treesize reduction 308, result has 33.5 percent of original size [2023-12-16 00:20:49,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 208 [2023-12-16 00:20:54,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:54,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 330 treesize of output 166 [2023-12-16 00:20:54,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 00:20:54,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 573 treesize of output 297 [2023-12-16 00:20:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 00:20:54,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:20:57,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:20:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412032740] [2023-12-16 00:20:57,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 00:20:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715565449] [2023-12-16 00:20:57,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715565449] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:20:57,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 00:20:57,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-12-16 00:20:57,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694216945] [2023-12-16 00:20:57,275 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 00:20:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-16 00:20:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:20:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-16 00:20:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2502, Unknown=0, NotChecked=0, Total=2756 [2023-12-16 00:20:57,276 INFO L87 Difference]: Start difference. First operand 622 states and 855 transitions. Second operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Received shutdown request... [2023-12-16 00:21:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-16 00:21:02,343 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 [2023-12-16 00:21:02,343 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:21:02,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=526, Invalid=5024, Unknown=0, NotChecked=0, Total=5550 [2023-12-16 00:21:02,343 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 96 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-16 00:21:02,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 454 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-16 00:21:02,344 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 00:21:02,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-16 00:21:02,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:21:02,549 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (622states) and FLOYD_HOARE automaton (currently 39 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (219 states constructed, input type IntersectNwa). [2023-12-16 00:21:02,552 INFO L445 BasicCegarLoop]: Path program histogram: [19, 1, 1, 1, 1] [2023-12-16 00:21:02,553 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:21:02,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:21:02 BoogieIcfgContainer [2023-12-16 00:21:02,554 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:21:02,554 INFO L158 Benchmark]: Toolchain (without parser) took 69825.94ms. Allocated memory was 191.9MB in the beginning and 715.1MB in the end (delta: 523.2MB). Free memory was 154.3MB in the beginning and 361.9MB in the end (delta: -207.6MB). Peak memory consumption was 316.4MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,554 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 148.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:21:02,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 191.9MB. Free memory was 154.0MB in the beginning and 142.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,555 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.70ms. Allocated memory is still 191.9MB. Free memory was 142.5MB in the beginning and 140.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,555 INFO L158 Benchmark]: Boogie Preprocessor took 40.88ms. Allocated memory is still 191.9MB. Free memory was 140.7MB in the beginning and 138.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,555 INFO L158 Benchmark]: RCFGBuilder took 289.01ms. Allocated memory is still 191.9MB. Free memory was 138.6MB in the beginning and 124.7MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,555 INFO L158 Benchmark]: TraceAbstraction took 69273.18ms. Allocated memory was 191.9MB in the beginning and 715.1MB in the end (delta: 523.2MB). Free memory was 123.9MB in the beginning and 361.9MB in the end (delta: -238.0MB). Peak memory consumption was 286.0MB. Max. memory is 8.0GB. [2023-12-16 00:21:02,557 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 148.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.14ms. Allocated memory is still 191.9MB. Free memory was 154.0MB in the beginning and 142.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.70ms. Allocated memory is still 191.9MB. Free memory was 142.5MB in the beginning and 140.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.88ms. Allocated memory is still 191.9MB. Free memory was 140.7MB in the beginning and 138.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 289.01ms. Allocated memory is still 191.9MB. Free memory was 138.6MB in the beginning and 124.7MB in the end (delta: 13.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 69273.18ms. Allocated memory was 191.9MB in the beginning and 715.1MB in the end (delta: 523.2MB). Free memory was 123.9MB in the beginning and 361.9MB in the end (delta: -238.0MB). Peak memory consumption was 286.0MB. 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: 40]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 40). Cancelled while NwaCegarLoop was constructing difference of abstraction (622states) and FLOYD_HOARE automaton (currently 39 states, 35 states before enhancement),while ReachableStatesComputation was computing reachable states (219 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 69.2s, OverallIterations: 23, TraceHistogramMax: 7, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 21.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3600 SdHoareTripleChecker+Valid, 12.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3360 mSDsluCounter, 6699 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5420 mSDsCounter, 2276 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12251 IncrementalHoareTripleChecker+Invalid, 14527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2276 mSolverCounterUnsat, 1279 mSDtfsCounter, 12251 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2015 GetRequests, 1254 SyntacticMatches, 88 SemanticMatches, 673 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7618 ImplicationChecksByTransitivity, 24.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=622occurred in iteration=22, InterpolantAutomatonStates: 414, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 942 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 38.8s InterpolantComputationTime, 1070 NumberOfCodeBlocks, 1063 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 1623 ConstructedInterpolants, 160 QuantifiedInterpolants, 45579 SizeOfPredicates, 196 NumberOfNonLiveVariables, 4097 ConjunctsInSsa, 796 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 1537/2085 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