/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/array8_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 09:42:34,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 09:42:34,744 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 09:42:34,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 09:42:34,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 09:42:34,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 09:42:34,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 09:42:34,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 09:42:34,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 09:42:34,765 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 09:42:34,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 09:42:34,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 09:42:34,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 09:42:34,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 09:42:34,766 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 09:42:34,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 09:42:34,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 09:42:34,767 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 09:42:34,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 09:42:34,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 09:42:34,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 09:42:34,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 09:42:34,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 09:42:34,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 09:42:34,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 09:42:34,769 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 09:42:34,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 09:42:34,769 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 09:42:34,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 09:42:34,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 09:42:34,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 09:42:34,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 09:42:34,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:42:34,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 09:42:34,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 09:42:34,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 09:42:34,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 09:42:34,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 09:42:34,772 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 09:42:34,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 09:42:34,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 09:42:34,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 09:42:34,977 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 09:42:34,978 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 09:42:34,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array8_pattern.c [2023-12-20 09:42:36,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 09:42:36,157 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 09:42:36,157 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array8_pattern.c [2023-12-20 09:42:36,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c9cf2a0/264bcd0ba8864f269d0590f807ff938a/FLAG2da98d30f [2023-12-20 09:42:36,174 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c9cf2a0/264bcd0ba8864f269d0590f807ff938a [2023-12-20 09:42:36,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 09:42:36,177 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 09:42:36,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 09:42:36,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 09:42:36,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 09:42:36,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5f6a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36, skipping insertion in model container [2023-12-20 09:42:36,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 09:42:36,286 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/array8_pattern.c[1321,1334] [2023-12-20 09:42:36,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:42:36,303 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 09:42:36,310 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/array8_pattern.c[1321,1334] [2023-12-20 09:42:36,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:42:36,325 INFO L206 MainTranslator]: Completed translation [2023-12-20 09:42:36,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36 WrapperNode [2023-12-20 09:42:36,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 09:42:36,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 09:42:36,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 09:42:36,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 09:42:36,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,354 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-20 09:42:36,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 09:42:36,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 09:42:36,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 09:42:36,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 09:42:36,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,364 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,372 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 3, 4]. 44 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]. [2023-12-20 09:42:36,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 09:42:36,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 09:42:36,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 09:42:36,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 09:42:36,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (1/1) ... [2023-12-20 09:42:36,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:42:36,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:36,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 09:42:36,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 09:42:36,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-20 09:42:36,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 09:42:36,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 09:42:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 09:42:36,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 09:42:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 09:42:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 09:42:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 09:42:36,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 09:42:36,539 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 09:42:36,542 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 09:42:36,714 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 09:42:36,732 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 09:42:36,733 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 09:42:36,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:42:36 BoogieIcfgContainer [2023-12-20 09:42:36,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 09:42:36,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 09:42:36,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 09:42:36,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 09:42:36,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 09:42:36" (1/3) ... [2023-12-20 09:42:36,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725a6aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:42:36, skipping insertion in model container [2023-12-20 09:42:36,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:42:36" (2/3) ... [2023-12-20 09:42:36,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725a6aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:42:36, skipping insertion in model container [2023-12-20 09:42:36,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:42:36" (3/3) ... [2023-12-20 09:42:36,741 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2023-12-20 09:42:36,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 09:42:36,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 09:42:36,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 09:42:36,792 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;@4bc14995, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 09:42:36,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 09:42:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-20 09:42:36,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:36,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:36,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:36,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -854186686, now seen corresponding path program 1 times [2023-12-20 09:42:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:36,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353307234] [2023-12-20 09:42:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:36,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:42:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:36,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353307234] [2023-12-20 09:42:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353307234] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:42:36,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:42:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 09:42:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363110309] [2023-12-20 09:42:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:42:36,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 09:42:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:36,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 09:42:36,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 09:42:36,959 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2023-12-20 09:42:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:36,984 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2023-12-20 09:42:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 09:42:36,986 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 [2023-12-20 09:42:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:36,990 INFO L225 Difference]: With dead ends: 44 [2023-12-20 09:42:36,990 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 09:42:36,992 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 [2023-12-20 09:42:36,994 INFO L413 NwaCegarLoop]: 23 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, 23 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 [2023-12-20 09:42:36,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:42:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 09:42:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 09:42:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-20 09:42:37,033 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-12-20 09:42:37,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:37,033 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-20 09:42:37,034 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) [2023-12-20 09:42:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-20 09:42:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-20 09:42:37,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:37,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:37,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 09:42:37,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:37,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -543729777, now seen corresponding path program 1 times [2023-12-20 09:42:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:37,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850405263] [2023-12-20 09:42:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:37,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:37,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964089097] [2023-12-20 09:42:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:37,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 09:42:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:37,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 09:42:37,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:37,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 09:42:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850405263] [2023-12-20 09:42:37,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964089097] [2023-12-20 09:42:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964089097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:42:37,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:42:37,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 09:42:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080190374] [2023-12-20 09:42:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:42:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 09:42:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 09:42:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 09:42:37,277 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:37,361 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-12-20 09:42:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 09:42:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-20 09:42:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:37,364 INFO L225 Difference]: With dead ends: 44 [2023-12-20 09:42:37,364 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 09:42:37,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-20 09:42:37,368 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:37,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 50 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:42:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 09:42:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-20 09:42:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-12-20 09:42:37,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2023-12-20 09:42:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:37,380 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-12-20 09:42:37,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-12-20 09:42:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 09:42:37,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:37,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:37,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 09:42:37,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:37,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:37,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2094503594, now seen corresponding path program 1 times [2023-12-20 09:42:37,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:37,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594120817] [2023-12-20 09:42:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:37,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973778152] [2023-12-20 09:42:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:37,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:37,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 09:42:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:42:37,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-20 09:42:37,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:37,775 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 1 [2023-12-20 09:42:38,027 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 1 [2023-12-20 09:42:38,133 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-12-20 09:42:38,134 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 41 treesize of output 33 [2023-12-20 09:42:38,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-20 09:42:38,262 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 17 treesize of output 9 [2023-12-20 09:42:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:38,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:38,420 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 29 treesize of output 27 [2023-12-20 09:42:38,425 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 48 treesize of output 46 [2023-12-20 09:42:38,713 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 39 treesize of output 37 [2023-12-20 09:42:38,717 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 56 treesize of output 54 [2023-12-20 09:42:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:42:38,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594120817] [2023-12-20 09:42:38,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973778152] [2023-12-20 09:42:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973778152] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:42:38,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:42:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2023-12-20 09:42:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931685516] [2023-12-20 09:42:38,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:38,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-20 09:42:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-20 09:42:38,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2023-12-20 09:42:38,787 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 09:42:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:39,442 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-12-20 09:42:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 09:42:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-20 09:42:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:39,443 INFO L225 Difference]: With dead ends: 72 [2023-12-20 09:42:39,443 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 09:42:39,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=2011, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:42:39,445 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:39,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 201 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:42:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 09:42:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-12-20 09:42:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:42:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-12-20 09:42:39,452 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2023-12-20 09:42:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:39,452 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-12-20 09:42:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 09:42:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-12-20 09:42:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 09:42:39,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:39,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:39,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-20 09:42:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-20 09:42:39,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -477637545, now seen corresponding path program 2 times [2023-12-20 09:42:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425586097] [2023-12-20 09:42:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:39,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:39,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262787533] [2023-12-20 09:42:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:42:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:39,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:39,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 09:42:39,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:42:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:39,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 09:42:39,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:39,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:42:39,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425586097] [2023-12-20 09:42:39,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262787533] [2023-12-20 09:42:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262787533] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:42:39,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:42:39,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 09:42:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54746772] [2023-12-20 09:42:39,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 09:42:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 09:42:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 09:42:39,810 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:39,865 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2023-12-20 09:42:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 09:42:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-20 09:42:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:39,867 INFO L225 Difference]: With dead ends: 52 [2023-12-20 09:42:39,867 INFO L226 Difference]: Without dead ends: 33 [2023-12-20 09:42:39,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:42:39,870 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:39,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:42:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-20 09:42:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-12-20 09:42:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-12-20 09:42:39,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 27 [2023-12-20 09:42:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:39,882 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-12-20 09:42:39,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-12-20 09:42:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 09:42:39,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:39,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:39,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-20 09:42:40,087 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 [2023-12-20 09:42:40,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:40,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -617729986, now seen corresponding path program 3 times [2023-12-20 09:42:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:40,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351250275] [2023-12-20 09:42:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:40,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:40,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:40,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500834103] [2023-12-20 09:42:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:42:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:40,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:40,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 09:42:40,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 09:42:40,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:40,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 09:42:40,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:40,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:42:40,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:40,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351250275] [2023-12-20 09:42:40,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:40,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500834103] [2023-12-20 09:42:40,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500834103] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:42:40,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:42:40,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 09:42:40,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914607222] [2023-12-20 09:42:40,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:40,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 09:42:40,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 09:42:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 09:42:40,273 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:42:40,316 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-12-20 09:42:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 09:42:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-20 09:42:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:42:40,317 INFO L225 Difference]: With dead ends: 33 [2023-12-20 09:42:40,317 INFO L226 Difference]: Without dead ends: 29 [2023-12-20 09:42:40,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:42:40,318 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:42:40,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 50 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:42:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-20 09:42:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-20 09:42:40,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:42:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-12-20 09:42:40,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2023-12-20 09:42:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:42:40,322 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-12-20 09:42:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:42:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-12-20 09:42:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 09:42:40,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:42:40,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:42:40,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 09:42:40,527 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 [2023-12-20 09:42:40,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:42:40,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:42:40,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1942295953, now seen corresponding path program 4 times [2023-12-20 09:42:40,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:42:40,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381522820] [2023-12-20 09:42:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:42:40,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:42:40,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:42:40,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556150514] [2023-12-20 09:42:40,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:42:40,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:42:40,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:42:40,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:42:40,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 09:42:40,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:42:40,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:42:40,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 09:42:40,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:42:40,661 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 [2023-12-20 09:42:40,666 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 23 treesize of output 1 [2023-12-20 09:42:40,696 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 31 treesize of output 15 [2023-12-20 09:42:40,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-12-20 09:42:41,132 INFO L349 Elim1Store]: treesize reduction 132, result has 33.0 percent of original size [2023-12-20 09:42:41,133 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 9 case distinctions, treesize of input 64 treesize of output 77 [2023-12-20 09:42:41,487 INFO L349 Elim1Store]: treesize reduction 144, result has 41.2 percent of original size [2023-12-20 09:42:41,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 79 treesize of output 122 [2023-12-20 09:42:41,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:41,900 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 33 treesize of output 21 [2023-12-20 09:42:41,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:42:41,904 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 29 treesize of output 13 [2023-12-20 09:42:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:42:41,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:42:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:42:43,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:42:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381522820] [2023-12-20 09:42:43,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:42:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556150514] [2023-12-20 09:42:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556150514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:42:43,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:42:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2023-12-20 09:42:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703393540] [2023-12-20 09:42:43,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:42:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 09:42:43,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:42:43,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 09:42:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:42:43,230 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 32 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:43:28,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 43.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 09:43:32,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 09:43:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:43:36,022 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2023-12-20 09:43:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-20 09:43:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 32 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-20 09:43:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:43:36,024 INFO L225 Difference]: With dead ends: 107 [2023-12-20 09:43:36,024 INFO L226 Difference]: Without dead ends: 101 [2023-12-20 09:43:36,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=708, Invalid=4404, Unknown=0, NotChecked=0, Total=5112 [2023-12-20 09:43:36,026 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:43:36,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 292 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 653 Invalid, 2 Unknown, 0 Unchecked, 49.8s Time] [2023-12-20 09:43:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-20 09:43:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2023-12-20 09:43:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-20 09:43:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-12-20 09:43:36,037 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2023-12-20 09:43:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:43:36,038 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-12-20 09:43:36,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 32 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:43:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-12-20 09:43:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 09:43:36,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:43:36,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:43:36,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 09:43:36,243 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 [2023-12-20 09:43:36,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:43:36,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:43:36,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1959644333, now seen corresponding path program 1 times [2023-12-20 09:43:36,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:43:36,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128625550] [2023-12-20 09:43:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:43:36,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:43:36,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:43:36,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349962453] [2023-12-20 09:43:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:43:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:43:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:43:36,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:43:36,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 09:43:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:43:36,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 09:43:36,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:43:36,388 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 [2023-12-20 09:43:36,397 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 1 [2023-12-20 09:43:36,429 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 [2023-12-20 09:43:36,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:43:36,753 INFO L349 Elim1Store]: treesize reduction 104, result has 30.2 percent of original size [2023-12-20 09:43:36,753 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 9 case distinctions, treesize of input 48 treesize of output 57 [2023-12-20 09:43:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:36,975 INFO L349 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2023-12-20 09:43:36,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 57 [2023-12-20 09:43:37,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:37,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 109 [2023-12-20 09:43:37,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:37,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 84 [2023-12-20 09:43:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:43:37,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:43:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:43:38,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128625550] [2023-12-20 09:43:38,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:43:38,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349962453] [2023-12-20 09:43:38,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349962453] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:43:38,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:43:38,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-20 09:43:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697090122] [2023-12-20 09:43:38,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:43:38,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 09:43:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:43:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 09:43:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-12-20 09:43:38,141 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:43:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:43:38,987 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2023-12-20 09:43:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 09:43:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-20 09:43:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:43:38,989 INFO L225 Difference]: With dead ends: 85 [2023-12-20 09:43:38,989 INFO L226 Difference]: Without dead ends: 81 [2023-12-20 09:43:38,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2023-12-20 09:43:38,989 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:43:38,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 148 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:43:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-20 09:43:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2023-12-20 09:43:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-20 09:43:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-12-20 09:43:39,004 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 28 [2023-12-20 09:43:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:43:39,004 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-12-20 09:43:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:43:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-12-20 09:43:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 09:43:39,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:43:39,005 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:43:39,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 09:43:39,210 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 [2023-12-20 09:43:39,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:43:39,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:43:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 646896608, now seen corresponding path program 2 times [2023-12-20 09:43:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:43:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977777534] [2023-12-20 09:43:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:43:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:43:39,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:43:39,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86393589] [2023-12-20 09:43:39,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:43:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:43:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:43:39,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:43:39,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 09:43:39,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:43:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:43:39,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 09:43:39,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:43:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:43:39,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:43:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:43:39,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:43:39,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977777534] [2023-12-20 09:43:39,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:43:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86393589] [2023-12-20 09:43:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86393589] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:43:39,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:43:39,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 09:43:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169003795] [2023-12-20 09:43:39,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:43:39,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 09:43:39,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:43:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 09:43:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:43:39,383 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:43:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:43:39,485 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2023-12-20 09:43:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 09:43:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-12-20 09:43:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:43:39,487 INFO L225 Difference]: With dead ends: 107 [2023-12-20 09:43:39,487 INFO L226 Difference]: Without dead ends: 92 [2023-12-20 09:43:39,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-20 09:43:39,489 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:43:39,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:43:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-20 09:43:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2023-12-20 09:43:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-20 09:43:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-12-20 09:43:39,518 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 29 [2023-12-20 09:43:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:43:39,518 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-12-20 09:43:39,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:43:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-12-20 09:43:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 09:43:39,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:43:39,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:43:39,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 09:43:39,728 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 [2023-12-20 09:43:39,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:43:39,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:43:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1158375030, now seen corresponding path program 5 times [2023-12-20 09:43:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:43:39,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459559365] [2023-12-20 09:43:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:43:39,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:43:39,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:43:39,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626656029] [2023-12-20 09:43:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:43:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:43:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:43:39,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:43:39,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 09:43:39,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 09:43:39,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:43:39,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-20 09:43:39,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:43:39,866 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 [2023-12-20 09:43:39,871 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 1 [2023-12-20 09:43:39,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:43:39,914 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 [2023-12-20 09:43:39,956 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:43:39,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:39,966 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 [2023-12-20 09:43:40,457 INFO L349 Elim1Store]: treesize reduction 156, result has 30.0 percent of original size [2023-12-20 09:43:40,457 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 18 case distinctions, treesize of input 62 treesize of output 85 [2023-12-20 09:43:40,776 INFO L349 Elim1Store]: treesize reduction 168, result has 40.6 percent of original size [2023-12-20 09:43:40,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 77 treesize of output 142 [2023-12-20 09:43:41,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:41,500 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 152 treesize of output 108 [2023-12-20 09:43:41,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:41,518 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 108 treesize of output 64 [2023-12-20 09:43:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:43:41,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:43:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:43:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459559365] [2023-12-20 09:43:42,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:43:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626656029] [2023-12-20 09:43:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626656029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:43:42,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:43:42,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-20 09:43:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400165239] [2023-12-20 09:43:42,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:43:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 09:43:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:43:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 09:43:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2023-12-20 09:43:42,082 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:43:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:43:42,728 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2023-12-20 09:43:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 09:43:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-20 09:43:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:43:42,729 INFO L225 Difference]: With dead ends: 116 [2023-12-20 09:43:42,729 INFO L226 Difference]: Without dead ends: 112 [2023-12-20 09:43:42,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=242, Invalid=1398, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:43:42,731 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:43:42,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 231 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:43:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-20 09:43:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2023-12-20 09:43:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-20 09:43:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-12-20 09:43:42,761 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 30 [2023-12-20 09:43:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:43:42,761 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-12-20 09:43:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:43:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-12-20 09:43:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-20 09:43:42,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:43:42,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:43:42,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 09:43:42,971 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 [2023-12-20 09:43:42,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:43:42,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:43:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1859439608, now seen corresponding path program 3 times [2023-12-20 09:43:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:43:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692166517] [2023-12-20 09:43:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:43:42,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:43:42,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:43:42,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450921983] [2023-12-20 09:43:42,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:43:42,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:43:42,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:43:42,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:43:42,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 09:43:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 09:43:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:43:43,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-20 09:43:43,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:43:43,111 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 [2023-12-20 09:43:43,119 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 1 [2023-12-20 09:43:43,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:43:43,147 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 [2023-12-20 09:43:43,205 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2023-12-20 09:43:43,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 29 [2023-12-20 09:43:43,227 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-12-20 09:43:43,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-12-20 09:43:43,730 INFO L349 Elim1Store]: treesize reduction 250, result has 23.5 percent of original size [2023-12-20 09:43:43,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 70 treesize of output 95 [2023-12-20 09:43:43,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:44,042 INFO L349 Elim1Store]: treesize reduction 142, result has 35.7 percent of original size [2023-12-20 09:43:44,043 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 17 case distinctions, treesize of input 70 treesize of output 111 [2023-12-20 09:43:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:46,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:46,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 369 treesize of output 470 [2023-12-20 09:43:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:43:46,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:43:46,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 271 treesize of output 384 [2023-12-20 09:44:15,652 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-20 09:44:15,828 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-20 09:44:16,000 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-20 09:44:16,157 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-20 09:44:21,338 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:44:21,523 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:44:21,828 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:44:22,011 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-20 09:44:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:29,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692166517] [2023-12-20 09:44:32,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:32,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450921983] [2023-12-20 09:44:32,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450921983] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:44:32,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:44:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-20 09:44:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276365848] [2023-12-20 09:44:32,688 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:32,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:44:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:44:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-12-20 09:44:32,691 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:33,986 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2023-12-20 09:44:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 09:44:33,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-20 09:44:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:33,987 INFO L225 Difference]: With dead ends: 114 [2023-12-20 09:44:33,987 INFO L226 Difference]: Without dead ends: 110 [2023-12-20 09:44:33,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:44:33,988 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:33,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:44:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-20 09:44:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2023-12-20 09:44:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-20 09:44:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-12-20 09:44:34,015 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 30 [2023-12-20 09:44:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:34,015 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-12-20 09:44:34,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-12-20 09:44:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 09:44:34,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:34,016 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:34,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:34,221 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 [2023-12-20 09:44:34,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:34,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1577351991, now seen corresponding path program 6 times [2023-12-20 09:44:34,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:34,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039129450] [2023-12-20 09:44:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:34,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:34,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854604365] [2023-12-20 09:44:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:44:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:34,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:44:34,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 09:44:34,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 09:44:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:34,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 09:44:34,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:34,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039129450] [2023-12-20 09:44:34,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854604365] [2023-12-20 09:44:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854604365] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:34,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-20 09:44:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008991934] [2023-12-20 09:44:34,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 09:44:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 09:44:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-20 09:44:34,440 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:34,606 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2023-12-20 09:44:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 09:44:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-20 09:44:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:34,607 INFO L225 Difference]: With dead ends: 144 [2023-12-20 09:44:34,607 INFO L226 Difference]: Without dead ends: 134 [2023-12-20 09:44:34,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-12-20 09:44:34,607 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:34,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 117 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-20 09:44:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2023-12-20 09:44:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-20 09:44:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-12-20 09:44:34,633 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 31 [2023-12-20 09:44:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:34,633 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-12-20 09:44:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-12-20 09:44:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 09:44:34,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:34,634 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:34,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:34,838 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 [2023-12-20 09:44:34,840 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:34,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash 92502366, now seen corresponding path program 7 times [2023-12-20 09:44:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:34,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63358525] [2023-12-20 09:44:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:34,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:34,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303954063] [2023-12-20 09:44:34,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:44:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:34,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:34,851 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) [2023-12-20 09:44:34,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 09:44:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:44:34,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 09:44:34,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:34,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63358525] [2023-12-20 09:44:35,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303954063] [2023-12-20 09:44:35,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303954063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:35,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-20 09:44:35,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690772706] [2023-12-20 09:44:35,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:35,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 09:44:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 09:44:35,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-20 09:44:35,034 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:35,146 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2023-12-20 09:44:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 09:44:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-20 09:44:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:35,147 INFO L225 Difference]: With dead ends: 130 [2023-12-20 09:44:35,147 INFO L226 Difference]: Without dead ends: 126 [2023-12-20 09:44:35,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-12-20 09:44:35,148 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:35,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 89 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-20 09:44:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 89. [2023-12-20 09:44:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-20 09:44:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2023-12-20 09:44:35,171 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 31 [2023-12-20 09:44:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:35,171 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2023-12-20 09:44:35,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2023-12-20 09:44:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:44:35,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:35,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:35,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:35,376 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 [2023-12-20 09:44:35,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:35,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1399929521, now seen corresponding path program 8 times [2023-12-20 09:44:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:35,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353087669] [2023-12-20 09:44:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:35,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:35,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083896958] [2023-12-20 09:44:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:44:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:35,388 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) [2023-12-20 09:44:35,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 09:44:35,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:44:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:35,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-20 09:44:35,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:35,505 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 1 [2023-12-20 09:44:35,508 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 [2023-12-20 09:44:35,541 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 [2023-12-20 09:44:35,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:44:35,596 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:44:35,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:35,606 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 [2023-12-20 09:44:35,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:35,661 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 [2023-12-20 09:44:35,675 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 0 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 09:44:36,044 INFO L349 Elim1Store]: treesize reduction 72, result has 38.5 percent of original size [2023-12-20 09:44:36,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 57 [2023-12-20 09:44:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:36,267 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-12-20 09:44:36,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 48 treesize of output 50 [2023-12-20 09:44:36,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:36,659 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 62 treesize of output 30 [2023-12-20 09:44:36,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:36,663 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 59 treesize of output 27 [2023-12-20 09:44:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:36,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353087669] [2023-12-20 09:44:37,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083896958] [2023-12-20 09:44:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083896958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:44:37,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:44:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-20 09:44:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000711200] [2023-12-20 09:44:37,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:44:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:44:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-12-20 09:44:37,101 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:37,727 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-12-20 09:44:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-20 09:44:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-20 09:44:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:37,729 INFO L225 Difference]: With dead ends: 113 [2023-12-20 09:44:37,729 INFO L226 Difference]: Without dead ends: 109 [2023-12-20 09:44:37,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 09:44:37,730 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:37,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 217 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:44:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-20 09:44:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2023-12-20 09:44:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-20 09:44:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2023-12-20 09:44:37,773 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 32 [2023-12-20 09:44:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:37,773 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2023-12-20 09:44:37,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2023-12-20 09:44:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:44:37,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:37,775 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:37,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:37,980 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 [2023-12-20 09:44:37,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1141764083, now seen corresponding path program 4 times [2023-12-20 09:44:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610918849] [2023-12-20 09:44:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:37,990 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759386963] [2023-12-20 09:44:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:44:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:37,992 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) [2023-12-20 09:44:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 09:44:38,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:44:38,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:38,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-20 09:44:38,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:38,098 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 [2023-12-20 09:44:38,109 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 1 [2023-12-20 09:44:38,133 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 [2023-12-20 09:44:38,143 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 [2023-12-20 09:44:38,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:38,178 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 [2023-12-20 09:44:38,192 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:44:38,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:38,233 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 [2023-12-20 09:44:38,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:38,252 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 [2023-12-20 09:44:38,791 INFO L349 Elim1Store]: treesize reduction 208, result has 30.0 percent of original size [2023-12-20 09:44:38,791 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 30 case distinctions, treesize of input 76 treesize of output 113 [2023-12-20 09:44:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:39,151 INFO L349 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2023-12-20 09:44:39,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 76 treesize of output 97 [2023-12-20 09:44:39,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:39,652 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 111 treesize of output 71 [2023-12-20 09:44:39,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:39,657 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 77 treesize of output 45 [2023-12-20 09:44:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:39,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:40,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:40,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610918849] [2023-12-20 09:44:40,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:40,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759386963] [2023-12-20 09:44:40,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759386963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:44:40,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:44:40,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-20 09:44:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115638856] [2023-12-20 09:44:40,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 09:44:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 09:44:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 09:44:40,963 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:41,820 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2023-12-20 09:44:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 09:44:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-20 09:44:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:41,821 INFO L225 Difference]: With dead ends: 141 [2023-12-20 09:44:41,821 INFO L226 Difference]: Without dead ends: 128 [2023-12-20 09:44:41,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 09:44:41,822 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:41,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 276 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:44:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-20 09:44:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2023-12-20 09:44:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-20 09:44:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2023-12-20 09:44:41,854 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 32 [2023-12-20 09:44:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:41,854 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2023-12-20 09:44:41,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2023-12-20 09:44:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 09:44:41,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:41,855 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:41,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:42,059 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 [2023-12-20 09:44:42,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:42,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -420677762, now seen corresponding path program 9 times [2023-12-20 09:44:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:42,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835418712] [2023-12-20 09:44:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:42,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:42,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070064282] [2023-12-20 09:44:42,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:44:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:42,084 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) [2023-12-20 09:44:42,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 09:44:42,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 09:44:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:42,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 09:44:42,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:42,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:42,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:42,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835418712] [2023-12-20 09:44:42,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:42,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070064282] [2023-12-20 09:44:42,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070064282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:42,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:42,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-20 09:44:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023419349] [2023-12-20 09:44:42,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:42,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 09:44:42,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 09:44:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-20 09:44:42,362 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:42,611 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2023-12-20 09:44:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-20 09:44:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-12-20 09:44:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:42,614 INFO L225 Difference]: With dead ends: 164 [2023-12-20 09:44:42,614 INFO L226 Difference]: Without dead ends: 153 [2023-12-20 09:44:42,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 09:44:42,615 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:42,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 137 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-20 09:44:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2023-12-20 09:44:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 106 states have internal predecessors, (126), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-20 09:44:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2023-12-20 09:44:42,655 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 33 [2023-12-20 09:44:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:42,655 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2023-12-20 09:44:42,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2023-12-20 09:44:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 09:44:42,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:42,656 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:42,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:42,861 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 [2023-12-20 09:44:42,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:42,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1051789557, now seen corresponding path program 5 times [2023-12-20 09:44:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156348182] [2023-12-20 09:44:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:42,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:42,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904945850] [2023-12-20 09:44:42,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:44:42,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:42,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:42,900 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) [2023-12-20 09:44:42,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 09:44:43,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 09:44:43,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:43,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 09:44:43,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:43,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:43,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156348182] [2023-12-20 09:44:43,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904945850] [2023-12-20 09:44:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904945850] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:43,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:43,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-20 09:44:43,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41078643] [2023-12-20 09:44:43,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:43,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 09:44:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 09:44:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-20 09:44:43,173 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:43,368 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2023-12-20 09:44:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 09:44:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-12-20 09:44:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:43,369 INFO L225 Difference]: With dead ends: 151 [2023-12-20 09:44:43,370 INFO L226 Difference]: Without dead ends: 147 [2023-12-20 09:44:43,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2023-12-20 09:44:43,372 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:43,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 183 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-20 09:44:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2023-12-20 09:44:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 97 states have internal predecessors, (115), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-20 09:44:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2023-12-20 09:44:43,434 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 33 [2023-12-20 09:44:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:43,434 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2023-12-20 09:44:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2023-12-20 09:44:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 09:44:43,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:43,436 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:43,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:43,636 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 [2023-12-20 09:44:43,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:43,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1139991658, now seen corresponding path program 10 times [2023-12-20 09:44:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200546719] [2023-12-20 09:44:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:43,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:43,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829933279] [2023-12-20 09:44:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:44:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:43,678 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) [2023-12-20 09:44:43,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 09:44:43,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:44:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:43,821 WARN L260 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-20 09:44:43,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:43,848 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 1 [2023-12-20 09:44:43,850 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 [2023-12-20 09:44:43,877 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 [2023-12-20 09:44:43,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:44:43,917 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:44:43,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:43,931 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 [2023-12-20 09:44:43,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:43,976 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 [2023-12-20 09:44:43,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:43,993 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 [2023-12-20 09:44:44,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:44,050 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 [2023-12-20 09:44:44,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:44,065 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 [2023-12-20 09:44:44,696 INFO L349 Elim1Store]: treesize reduction 260, result has 29.9 percent of original size [2023-12-20 09:44:44,696 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 45 case distinctions, treesize of input 90 treesize of output 141 [2023-12-20 09:44:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:45,112 INFO L349 Elim1Store]: treesize reduction 220, result has 16.3 percent of original size [2023-12-20 09:44:45,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 61 case distinctions, treesize of input 90 treesize of output 110 [2023-12-20 09:44:46,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:46,193 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 110 treesize of output 58 [2023-12-20 09:44:46,217 INFO L349 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-12-20 09:44:46,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 92 treesize of output 64 [2023-12-20 09:44:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:46,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200546719] [2023-12-20 09:44:51,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829933279] [2023-12-20 09:44:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829933279] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:44:51,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:44:51,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-20 09:44:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018159242] [2023-12-20 09:44:51,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:51,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 09:44:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 09:44:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1179, Unknown=1, NotChecked=0, Total=1406 [2023-12-20 09:44:51,444 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:52,799 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2023-12-20 09:44:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 09:44:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-12-20 09:44:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:52,800 INFO L225 Difference]: With dead ends: 150 [2023-12-20 09:44:52,801 INFO L226 Difference]: Without dead ends: 146 [2023-12-20 09:44:52,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=401, Invalid=1854, Unknown=1, NotChecked=0, Total=2256 [2023-12-20 09:44:52,801 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:52,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 278 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:44:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-20 09:44:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2023-12-20 09:44:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 109 states have internal predecessors, (130), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-20 09:44:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-12-20 09:44:52,847 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 34 [2023-12-20 09:44:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:52,848 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-12-20 09:44:52,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-12-20 09:44:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 09:44:52,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:52,849 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:52,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-20 09:44:53,055 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 [2023-12-20 09:44:53,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:53,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1726797672, now seen corresponding path program 6 times [2023-12-20 09:44:53,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:53,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191604153] [2023-12-20 09:44:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:53,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765817347] [2023-12-20 09:44:53,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:44:53,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:53,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:53,076 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) [2023-12-20 09:44:53,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 09:44:53,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 09:44:53,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:53,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-20 09:44:53,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:53,247 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 1 [2023-12-20 09:44:53,249 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 [2023-12-20 09:44:53,270 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 [2023-12-20 09:44:53,277 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 [2023-12-20 09:44:53,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:53,316 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 [2023-12-20 09:44:53,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:53,327 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 [2023-12-20 09:44:53,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:53,369 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 [2023-12-20 09:44:53,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:53,383 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 [2023-12-20 09:44:53,436 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 0 case distinctions, treesize of input 44 treesize of output 41 [2023-12-20 09:44:53,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:53,449 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 [2023-12-20 09:44:54,087 INFO L349 Elim1Store]: treesize reduction 260, result has 29.9 percent of original size [2023-12-20 09:44:54,087 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 45 case distinctions, treesize of input 90 treesize of output 141 [2023-12-20 09:44:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:44:54,456 INFO L349 Elim1Store]: treesize reduction 128, result has 26.0 percent of original size [2023-12-20 09:44:54,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 90 treesize of output 117 [2023-12-20 09:44:55,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:55,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 127 [2023-12-20 09:44:55,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:44:55,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 91 [2023-12-20 09:44:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:55,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:57,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191604153] [2023-12-20 09:44:57,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:57,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765817347] [2023-12-20 09:44:57,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765817347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:44:57,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:44:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-20 09:44:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470892456] [2023-12-20 09:44:57,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 09:44:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 09:44:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 09:44:57,002 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:58,161 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2023-12-20 09:44:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 09:44:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-12-20 09:44:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:58,163 INFO L225 Difference]: With dead ends: 153 [2023-12-20 09:44:58,163 INFO L226 Difference]: Without dead ends: 149 [2023-12-20 09:44:58,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:44:58,163 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:58,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 322 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:44:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-20 09:44:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 129. [2023-12-20 09:44:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 109 states have internal predecessors, (130), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-20 09:44:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-12-20 09:44:58,223 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 34 [2023-12-20 09:44:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:58,223 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-12-20 09:44:58,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:44:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-12-20 09:44:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 09:44:58,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:58,224 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:58,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 09:44:58,430 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 [2023-12-20 09:44:58,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -952538601, now seen corresponding path program 11 times [2023-12-20 09:44:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:58,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432008359] [2023-12-20 09:44:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:58,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:58,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590794105] [2023-12-20 09:44:58,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:44:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:58,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:58,446 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) [2023-12-20 09:44:58,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 09:44:58,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 09:44:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:58,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 09:44:58,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:58,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432008359] [2023-12-20 09:44:58,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:58,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590794105] [2023-12-20 09:44:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590794105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-20 09:44:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776105541] [2023-12-20 09:44:58,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:44:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:44:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-20 09:44:58,723 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:59,051 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2023-12-20 09:44:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 09:44:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 09:44:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:59,052 INFO L225 Difference]: With dead ends: 181 [2023-12-20 09:44:59,052 INFO L226 Difference]: Without dead ends: 169 [2023-12-20 09:44:59,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 09:44:59,053 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 266 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:59,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 140 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-20 09:44:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 139. [2023-12-20 09:44:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 117 states have (on average 1.188034188034188) internal successors, (139), 117 states have internal predecessors, (139), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-20 09:44:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2023-12-20 09:44:59,104 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 35 [2023-12-20 09:44:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:59,104 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2023-12-20 09:44:59,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2023-12-20 09:44:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 09:44:59,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:59,105 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:59,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-20 09:44:59,310 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 [2023-12-20 09:44:59,310 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:44:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:44:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1963885954, now seen corresponding path program 12 times [2023-12-20 09:44:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:44:59,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374886084] [2023-12-20 09:44:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:44:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:44:59,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:44:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119282217] [2023-12-20 09:44:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:44:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:44:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:44:59,320 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) [2023-12-20 09:44:59,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 09:44:59,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 09:44:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:44:59,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 09:44:59,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:44:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:44:59,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:44:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:44:59,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:44:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374886084] [2023-12-20 09:44:59,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:44:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119282217] [2023-12-20 09:44:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119282217] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:44:59,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 09:44:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-20 09:44:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668604364] [2023-12-20 09:44:59,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 09:44:59,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 09:44:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:44:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 09:44:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-20 09:44:59,632 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:44:59,841 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2023-12-20 09:44:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 09:44:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 09:44:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:44:59,842 INFO L225 Difference]: With dead ends: 169 [2023-12-20 09:44:59,843 INFO L226 Difference]: Without dead ends: 165 [2023-12-20 09:44:59,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-12-20 09:44:59,845 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:44:59,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 147 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:44:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-20 09:44:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2023-12-20 09:44:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 118 states have internal predecessors, (140), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-20 09:44:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2023-12-20 09:44:59,901 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 35 [2023-12-20 09:44:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:44:59,902 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2023-12-20 09:44:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 09:44:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2023-12-20 09:44:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 09:44:59,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:44:59,902 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:44:59,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 09:45:00,104 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 [2023-12-20 09:45:00,104 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:45:00,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:45:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -723458001, now seen corresponding path program 13 times [2023-12-20 09:45:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:45:00,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020056295] [2023-12-20 09:45:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:45:00,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:45:00,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:45:00,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635053845] [2023-12-20 09:45:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:45:00,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:45:00,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:45:00,131 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) [2023-12-20 09:45:00,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 09:45:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:45:00,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-20 09:45:00,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:45:00,287 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 [2023-12-20 09:45:00,296 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 1 [2023-12-20 09:45:00,324 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 [2023-12-20 09:45:00,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:45:00,384 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:45:00,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:00,392 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 [2023-12-20 09:45:00,451 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 0 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 09:45:00,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:00,462 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 [2023-12-20 09:45:00,531 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 0 case distinctions, treesize of input 44 treesize of output 41 [2023-12-20 09:45:00,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:00,541 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 [2023-12-20 09:45:00,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:00,602 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 [2023-12-20 09:45:00,626 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 0 case distinctions, treesize of input 51 treesize of output 51 [2023-12-20 09:45:01,432 INFO L349 Elim1Store]: treesize reduction 312, result has 29.9 percent of original size [2023-12-20 09:45:01,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 63 case distinctions, treesize of input 104 treesize of output 169 [2023-12-20 09:45:01,999 INFO L349 Elim1Store]: treesize reduction 408, result has 17.2 percent of original size [2023-12-20 09:45:01,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 15 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 104 treesize of output 130 [2023-12-20 09:45:04,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:04,394 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 [2023-12-20 09:45:04,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:04,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 124 treesize of output 100 [2023-12-20 09:45:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:45:04,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:45:05,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:45:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020056295] [2023-12-20 09:45:05,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:45:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635053845] [2023-12-20 09:45:05,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635053845] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:45:05,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:45:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-20 09:45:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168489176] [2023-12-20 09:45:05,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:45:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:45:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:45:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:45:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 09:45:05,555 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:45:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:45:06,905 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2023-12-20 09:45:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 09:45:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-12-20 09:45:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:45:06,906 INFO L225 Difference]: With dead ends: 166 [2023-12-20 09:45:06,906 INFO L226 Difference]: Without dead ends: 162 [2023-12-20 09:45:06,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 09:45:06,907 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:45:06,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 264 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:45:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-20 09:45:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2023-12-20 09:45:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.1875) internal successors, (152), 128 states have internal predecessors, (152), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-20 09:45:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2023-12-20 09:45:06,968 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 36 [2023-12-20 09:45:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:45:06,968 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2023-12-20 09:45:06,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:45:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2023-12-20 09:45:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 09:45:06,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:45:06,969 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:45:06,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 09:45:07,175 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 [2023-12-20 09:45:07,175 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:45:07,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:45:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1734575251, now seen corresponding path program 7 times [2023-12-20 09:45:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:45:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289053400] [2023-12-20 09:45:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:45:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:45:07,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:45:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419158025] [2023-12-20 09:45:07,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:45:07,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:45:07,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:45:07,190 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) [2023-12-20 09:45:07,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 09:45:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:45:07,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-20 09:45:07,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:45:07,379 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 [2023-12-20 09:45:07,384 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 1 [2023-12-20 09:45:07,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:45:07,427 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 [2023-12-20 09:45:07,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:07,467 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 [2023-12-20 09:45:07,480 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 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 09:45:07,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:07,532 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 [2023-12-20 09:45:07,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:07,555 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 [2023-12-20 09:45:07,613 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 0 case distinctions, treesize of input 44 treesize of output 41 [2023-12-20 09:45:07,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:07,635 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 [2023-12-20 09:45:07,709 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 0 case distinctions, treesize of input 51 treesize of output 51 [2023-12-20 09:45:07,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:07,726 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 [2023-12-20 09:45:08,620 INFO L349 Elim1Store]: treesize reduction 312, result has 29.9 percent of original size [2023-12-20 09:45:08,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 63 case distinctions, treesize of input 104 treesize of output 169 [2023-12-20 09:45:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:09,159 INFO L349 Elim1Store]: treesize reduction 164, result has 33.6 percent of original size [2023-12-20 09:45:09,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 57 case distinctions, treesize of input 104 treesize of output 161 [2023-12-20 09:45:11,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:11,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 236 treesize of output 238 [2023-12-20 09:45:11,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:45:11,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 192 treesize of output 190 [2023-12-20 09:45:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:45:12,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:45:13,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:45:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289053400] [2023-12-20 09:45:13,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:45:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419158025] [2023-12-20 09:45:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419158025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:45:13,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:45:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-20 09:45:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736153655] [2023-12-20 09:45:13,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:45:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:45:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:45:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:45:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 09:45:13,993 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:45:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:45:16,022 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2023-12-20 09:45:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 09:45:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-12-20 09:45:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:45:16,025 INFO L225 Difference]: With dead ends: 170 [2023-12-20 09:45:16,025 INFO L226 Difference]: Without dead ends: 166 [2023-12-20 09:45:16,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=320, Invalid=2130, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:45:16,026 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:45:16,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 384 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 09:45:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-20 09:45:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2023-12-20 09:45:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.1875) internal successors, (152), 128 states have internal predecessors, (152), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-20 09:45:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2023-12-20 09:45:16,090 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 36 [2023-12-20 09:45:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:45:16,090 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2023-12-20 09:45:16,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:45:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2023-12-20 09:45:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:45:16,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:45:16,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:45:16,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 09:45:16,293 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 [2023-12-20 09:45:16,293 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:45:16,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:45:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1267862781, now seen corresponding path program 1 times [2023-12-20 09:45:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:45:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790001364] [2023-12-20 09:45:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:45:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:45:16,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:45:16,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532398057] [2023-12-20 09:45:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:45:16,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:45:16,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:45:16,309 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) [2023-12-20 09:45:16,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 09:45:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:45:16,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-20 09:45:16,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:45:16,450 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 [2023-12-20 09:45:16,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:45:16,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 09:45:16,787 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-20 09:45:16,787 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 21 [2023-12-20 09:45:17,056 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-12-20 09:45:17,057 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 3 case distinctions, treesize of input 28 treesize of output 30 [2023-12-20 09:45:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:17,190 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-20 09:45:17,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 46 [2023-12-20 09:45:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:45:17,469 INFO L349 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-12-20 09:45:17,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 23 [2023-12-20 09:45:17,486 INFO L349 Elim1Store]: treesize reduction 69, result has 14.8 percent of original size [2023-12-20 09:45:17,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 31 [2023-12-20 09:45:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:45:17,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:45:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:45:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790001364] [2023-12-20 09:45:17,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 09:45:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532398057] [2023-12-20 09:45:17,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532398057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:45:17,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 09:45:17,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-20 09:45:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789801742] [2023-12-20 09:45:17,887 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 09:45:17,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:45:17,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:45:17,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:45:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 09:45:17,889 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:45:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:45:18,847 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2023-12-20 09:45:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 09:45:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-12-20 09:45:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:45:18,848 INFO L225 Difference]: With dead ends: 188 [2023-12-20 09:45:18,848 INFO L226 Difference]: Without dead ends: 172 [2023-12-20 09:45:18,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=2233, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 09:45:18,849 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:45:18,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 265 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:45:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-20 09:45:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2023-12-20 09:45:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.173913043478261) internal successors, (162), 138 states have internal predecessors, (162), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-20 09:45:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2023-12-20 09:45:18,917 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 38 [2023-12-20 09:45:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:45:18,918 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2023-12-20 09:45:18,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 09:45:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2023-12-20 09:45:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:45:18,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:45:18,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:45:18,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 09:45:19,126 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 [2023-12-20 09:45:19,126 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:45:19,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:45:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1692484221, now seen corresponding path program 2 times [2023-12-20 09:45:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:45:19,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991807203] [2023-12-20 09:45:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:45:19,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:45:19,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 09:45:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496185176] [2023-12-20 09:45:19,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:45:19,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:45:19,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:45:19,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:45:19,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 09:45:19,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:45:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:45:19,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-20 09:45:19,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:45:19,301 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 1 [2023-12-20 09:45:19,306 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 [2023-12-20 09:45:19,333 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 [2023-12-20 09:45:19,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 09:45:19,628 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-12-20 09:45:19,629 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 [2023-12-20 09:45:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:45:19,848 INFO L349 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2023-12-20 09:45:19,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 57 [2023-12-20 09:45:20,986 INFO L349 Elim1Store]: treesize reduction 288, result has 43.4 percent of original size [2023-12-20 09:45:20,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 224 treesize of output 392 [2023-12-20 09:46:13,906 WARN L293 SmtUtils]: Spent 15.43s on a formula simplification. DAG size of input: 649 DAG size of output: 642 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:46:52,630 WARN L293 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 435 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:47:07,495 INFO L190 IndexEqualityManager]: detected not equals via solver