/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-patterns/array6_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 20:24:53,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 20:24:53,454 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 20:24:53,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 20:24:53,459 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 20:24:53,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 20:24:53,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 20:24:53,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 20:24:53,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 20:24:53,485 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 20:24:53,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 20:24:53,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 20:24:53,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 20:24:53,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 20:24:53,487 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 20:24:53,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 20:24:53,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 20:24:53,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 20:24:53,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 20:24:53,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 20:24:53,489 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 20:24:53,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 20:24:53,490 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 20:24:53,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 20:24:53,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 20:24:53,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 20:24:53,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 20:24:53,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:24:53,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 20:24:53,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 20:24:53,493 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 20:24:53,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 20:24:53,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 20:24:53,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 20:24:53,657 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 20:24:53,658 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 20:24:53,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array6_pattern.c [2023-12-18 20:24:54,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 20:24:54,855 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 20:24:54,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c [2023-12-18 20:24:54,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c177c53/b9017cd7b7e545429b0b22deb34b65de/FLAG33a7b4587 [2023-12-18 20:24:54,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c177c53/b9017cd7b7e545429b0b22deb34b65de [2023-12-18 20:24:54,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 20:24:54,874 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 20:24:54,875 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 20:24:54,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 20:24:54,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 20:24:54,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:24:54" (1/1) ... [2023-12-18 20:24:54,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733189d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:54, skipping insertion in model container [2023-12-18 20:24:54,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:24:54" (1/1) ... [2023-12-18 20:24:54,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 20:24:55,004 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/array6_pattern.c[1356,1369] [2023-12-18 20:24:55,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:24:55,026 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 20:24:55,034 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/array6_pattern.c[1356,1369] [2023-12-18 20:24:55,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:24:55,050 INFO L206 MainTranslator]: Completed translation [2023-12-18 20:24:55,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55 WrapperNode [2023-12-18 20:24:55,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 20:24:55,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 20:24:55,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 20:24:55,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 20:24:55,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,090 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-12-18 20:24:55,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 20:24:55,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 20:24:55,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 20:24:55,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 20:24:55,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,120 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 5, 5]. 42 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]. [2023-12-18 20:24:55,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,121 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,130 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 20:24:55,131 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 20:24:55,131 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 20:24:55,131 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 20:24:55,131 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (1/1) ... [2023-12-18 20:24:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:24:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:55,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-18 20:24:55,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-18 20:24:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 20:24:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-18 20:24:55,178 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-18 20:24:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 20:24:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 20:24:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 20:24:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 20:24:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 20:24:55,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 20:24:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 20:24:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 20:24:55,241 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 20:24:55,242 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 20:24:55,390 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 20:24:55,416 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 20:24:55,416 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 20:24:55,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:24:55 BoogieIcfgContainer [2023-12-18 20:24:55,416 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 20:24:55,426 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 20:24:55,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 20:24:55,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 20:24:55,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:24:54" (1/3) ... [2023-12-18 20:24:55,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3a7a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:24:55, skipping insertion in model container [2023-12-18 20:24:55,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:24:55" (2/3) ... [2023-12-18 20:24:55,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3a7a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:24:55, skipping insertion in model container [2023-12-18 20:24:55,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:24:55" (3/3) ... [2023-12-18 20:24:55,430 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2023-12-18 20:24:55,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 20:24:55,442 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 20:24:55,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 20:24:55,473 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;@645effdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 20:24:55,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 20:24:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2023-12-18 20:24:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 20:24:55,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:55,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:24:55,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -208916493, now seen corresponding path program 1 times [2023-12-18 20:24:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:55,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023470359] [2023-12-18 20:24:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:55,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 20:24:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:24:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023470359] [2023-12-18 20:24:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023470359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:24:55,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:24:55,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 20:24:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528488365] [2023-12-18 20:24:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:24:55,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 20:24:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 20:24:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 20:24:55,638 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-18 20:24:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:55,674 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2023-12-18 20:24:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 20:24:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 14 [2023-12-18 20:24:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:55,680 INFO L225 Difference]: With dead ends: 38 [2023-12-18 20:24:55,680 INFO L226 Difference]: Without dead ends: 18 [2023-12-18 20:24:55,683 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 [2023-12-18 20:24:55,686 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2023-12-18 20:24:55,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:24:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-18 20:24:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-18 20:24:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-12-18 20:24:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-18 20:24:55,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2023-12-18 20:24:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:55,714 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-18 20:24:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-18 20:24:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-18 20:24:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 20:24:55,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:55,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:24:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 20:24:55,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1520585160, now seen corresponding path program 1 times [2023-12-18 20:24:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728361922] [2023-12-18 20:24:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:55,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 20:24:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:55,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 20:24:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:24:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728361922] [2023-12-18 20:24:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728361922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:24:55,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:24:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:24:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155451419] [2023-12-18 20:24:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:24:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 20:24:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 20:24:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:24:55,887 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-12-18 20:24:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:55,921 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-18 20:24:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 20:24:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 21 [2023-12-18 20:24:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:55,921 INFO L225 Difference]: With dead ends: 23 [2023-12-18 20:24:55,922 INFO L226 Difference]: Without dead ends: 19 [2023-12-18 20:24:55,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:24:55,923 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:55,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:24:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-18 20:24:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-18 20:24:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-12-18 20:24:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-12-18 20:24:55,928 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 21 [2023-12-18 20:24:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:55,929 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-12-18 20:24:55,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-12-18 20:24:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-12-18 20:24:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 20:24:55,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:55,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:24:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 20:24:55,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:55,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 133041195, now seen corresponding path program 1 times [2023-12-18 20:24:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:55,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517082075] [2023-12-18 20:24:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-18 20:24:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:56,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-18 20:24:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:24:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517082075] [2023-12-18 20:24:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517082075] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:24:56,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:24:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 20:24:56,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754412060] [2023-12-18 20:24:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:24:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:24:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:24:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:24:56,011 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-12-18 20:24:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:56,033 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-12-18 20:24:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 20:24:56,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) Word has length 22 [2023-12-18 20:24:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:56,034 INFO L225 Difference]: With dead ends: 35 [2023-12-18 20:24:56,034 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 20:24:56,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:24:56,035 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:56,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:24:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 20:24:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 20:24:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-12-18 20:24:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-18 20:24:56,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 22 [2023-12-18 20:24:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:56,039 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-18 20:24:56,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-12-18 20:24:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-18 20:24:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 20:24:56,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:56,040 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] [2023-12-18 20:24:56,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 20:24:56,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:56,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1617342797, now seen corresponding path program 1 times [2023-12-18 20:24:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:56,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67314137] [2023-12-18 20:24:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:56,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:56,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:24:56,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091136461] [2023-12-18 20:24:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:56,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:24:56,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 20:24:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:24:56,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:24:56,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:24:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:24:56,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:24:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:24:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67314137] [2023-12-18 20:24:56,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:24:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091136461] [2023-12-18 20:24:56,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091136461] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:24:56,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:24:56,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-18 20:24:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291130066] [2023-12-18 20:24:56,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:24:56,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 20:24:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 20:24:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:24:56,345 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 20:24:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:56,505 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-18 20:24:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 20:24:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-12-18 20:24:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:56,509 INFO L225 Difference]: With dead ends: 61 [2023-12-18 20:24:56,509 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 20:24:56,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-12-18 20:24:56,514 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:56,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 70 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:24:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 20:24:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2023-12-18 20:24:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2023-12-18 20:24:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-18 20:24:56,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 23 [2023-12-18 20:24:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:56,525 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-18 20:24:56,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 20:24:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-18 20:24:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 20:24:56,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:56,526 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:24:56,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 20:24:56,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:56,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:56,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 870749453, now seen corresponding path program 2 times [2023-12-18 20:24:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193051128] [2023-12-18 20:24:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:56,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:24:56,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770149496] [2023-12-18 20:24:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:24:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:56,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:56,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:24:56,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 20:24:56,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:24:56,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:24:56,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:24:56,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:24:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:24:56,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:24:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 20:24:56,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193051128] [2023-12-18 20:24:56,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:24:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770149496] [2023-12-18 20:24:56,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770149496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:24:56,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:24:56,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:24:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923464648] [2023-12-18 20:24:56,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:24:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:24:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:24:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:24:56,933 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-18 20:24:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:56,967 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-12-18 20:24:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 20:24:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 25 [2023-12-18 20:24:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:56,968 INFO L225 Difference]: With dead ends: 31 [2023-12-18 20:24:56,968 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 20:24:56,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:24:56,969 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:56,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:24:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 20:24:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-18 20:24:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2023-12-18 20:24:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-12-18 20:24:56,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-12-18 20:24:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-12-18 20:24:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-18 20:24:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-12-18 20:24:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 20:24:56,973 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:56,973 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] [2023-12-18 20:24:56,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 20:24:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:57,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:57,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1249970166, now seen corresponding path program 3 times [2023-12-18 20:24:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:57,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486172591] [2023-12-18 20:24:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:57,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:24:57,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428480151] [2023-12-18 20:24:57,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:24:57,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:57,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:24:57,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 20:24:57,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 20:24:57,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:24:57,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-18 20:24:57,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:24:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 20:24:57,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:24:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 20:24:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486172591] [2023-12-18 20:24:57,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:24:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428480151] [2023-12-18 20:24:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428480151] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:24:57,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:24:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-18 20:24:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899031081] [2023-12-18 20:24:57,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:24:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 20:24:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 20:24:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 20:24:57,402 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 20:24:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:57,455 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-12-18 20:24:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 20:24:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-18 20:24:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:57,456 INFO L225 Difference]: With dead ends: 38 [2023-12-18 20:24:57,457 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 20:24:57,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-12-18 20:24:57,457 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:57,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 59 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:24:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 20:24:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-12-18 20:24:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2023-12-18 20:24:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-12-18 20:24:57,466 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2023-12-18 20:24:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:57,466 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-12-18 20:24:57,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 20:24:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-12-18 20:24:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 20:24:57,467 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:57,467 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] [2023-12-18 20:24:57,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-18 20:24:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:57,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 120910381, now seen corresponding path program 4 times [2023-12-18 20:24:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:57,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583872370] [2023-12-18 20:24:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:57,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:24:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010935380] [2023-12-18 20:24:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:24:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:57,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:24:57,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 20:24:57,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:24:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:24:57,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-18 20:24:57,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:24:57,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:24:57,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:24:57,896 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 20 [2023-12-18 20:24:57,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:24:57,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:24:57,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:24:57,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:24:57,979 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 28 treesize of output 32 [2023-12-18 20:24:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,387 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,408 INFO L349 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2023-12-18 20:24:58,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 100 [2023-12-18 20:24:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:24:58,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-18 20:24:58,456 INFO L349 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2023-12-18 20:24:58,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 82 treesize of output 108 [2023-12-18 20:24:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:24:58,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:24:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:24:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583872370] [2023-12-18 20:24:59,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:24:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010935380] [2023-12-18 20:24:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010935380] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:24:59,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:24:59,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-18 20:24:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307761118] [2023-12-18 20:24:59,194 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:24:59,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 20:24:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:24:59,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 20:24:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-12-18 20:24:59,195 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 17 states have internal predecessors, (23), 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) [2023-12-18 20:24:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:24:59,699 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-12-18 20:24:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 20:24:59,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 17 states have internal predecessors, (23), 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 27 [2023-12-18 20:24:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:24:59,701 INFO L225 Difference]: With dead ends: 49 [2023-12-18 20:24:59,701 INFO L226 Difference]: Without dead ends: 45 [2023-12-18 20:24:59,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 20:24:59,702 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 20:24:59,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 97 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 20:24:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-18 20:24:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-12-18 20:24:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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) [2023-12-18 20:24:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-12-18 20:24:59,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2023-12-18 20:24:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:24:59,709 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-12-18 20:24:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 17 states have internal predecessors, (23), 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) [2023-12-18 20:24:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-12-18 20:24:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 20:24:59,709 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:24:59,709 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] [2023-12-18 20:24:59,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 20:24:59,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:59,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:24:59,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:24:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 56635979, now seen corresponding path program 5 times [2023-12-18 20:24:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:24:59,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426665411] [2023-12-18 20:24:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:24:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:24:59,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:24:59,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538720154] [2023-12-18 20:24:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:24:59,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:24:59,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:24:59,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:24:59,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 20:25:00,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 20:25:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:00,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 20:25:00,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:00,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:00,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426665411] [2023-12-18 20:25:00,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:00,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538720154] [2023-12-18 20:25:00,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538720154] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:00,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-18 20:25:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716797137] [2023-12-18 20:25:00,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:00,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 20:25:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 20:25:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-18 20:25:00,176 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2023-12-18 20:25:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:00,276 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-12-18 20:25:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 20:25:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 28 [2023-12-18 20:25:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:00,277 INFO L225 Difference]: With dead ends: 64 [2023-12-18 20:25:00,277 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 20:25:00,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-12-18 20:25:00,278 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:00,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 65 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:25:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 20:25:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2023-12-18 20:25:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 20:25:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-12-18 20:25:00,286 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 28 [2023-12-18 20:25:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:00,286 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-12-18 20:25:00,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2023-12-18 20:25:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-12-18 20:25:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 20:25:00,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:00,287 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] [2023-12-18 20:25:00,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:00,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash -520204586, now seen corresponding path program 6 times [2023-12-18 20:25:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433595369] [2023-12-18 20:25:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:00,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:00,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152331375] [2023-12-18 20:25:00,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:25:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:00,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:00,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 20:25:00,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 20:25:00,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:00,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 20:25:00,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:00,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433595369] [2023-12-18 20:25:00,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:00,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152331375] [2023-12-18 20:25:00,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152331375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:00,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:00,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-18 20:25:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72644045] [2023-12-18 20:25:00,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 20:25:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 20:25:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-18 20:25:00,739 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2023-12-18 20:25:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:00,834 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-18 20:25:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 20:25:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 28 [2023-12-18 20:25:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:00,835 INFO L225 Difference]: With dead ends: 65 [2023-12-18 20:25:00,835 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 20:25:00,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-12-18 20:25:00,835 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 84 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 20:25:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-18 20:25:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-18 20:25:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-18 20:25:00,845 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2023-12-18 20:25:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:00,845 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-18 20:25:00,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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) [2023-12-18 20:25:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-18 20:25:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 20:25:00,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:00,845 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] [2023-12-18 20:25:00,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-18 20:25:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:01,050 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1782256248, now seen corresponding path program 7 times [2023-12-18 20:25:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868805316] [2023-12-18 20:25:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:01,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396663452] [2023-12-18 20:25:01,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 20:25:01,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:01,060 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:01,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 20:25:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:25:01,218 WARN L260 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-18 20:25:01,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:01,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:01,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:01,330 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 20 [2023-12-18 20:25:01,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:01,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:25:01,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:01,380 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 28 treesize of output 32 [2023-12-18 20:25:01,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:01,441 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 [2023-12-18 20:25:01,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:01,468 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 37 treesize of output 44 [2023-12-18 20:25:01,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:01,964 INFO L349 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2023-12-18 20:25:01,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 100 treesize of output 139 [2023-12-18 20:25:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:02,049 INFO L349 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2023-12-18 20:25:02,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 88 treesize of output 127 [2023-12-18 20:25:02,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:02,550 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 105 treesize of output 73 [2023-12-18 20:25:02,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:02,555 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 68 treesize of output 44 [2023-12-18 20:25:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:02,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868805316] [2023-12-18 20:25:02,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396663452] [2023-12-18 20:25:02,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396663452] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:25:02,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:25:02,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-18 20:25:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678780037] [2023-12-18 20:25:02,958 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:02,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 20:25:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 20:25:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-12-18 20:25:02,959 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 19 states have internal predecessors, (25), 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) [2023-12-18 20:25:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:03,793 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2023-12-18 20:25:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 20:25:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 19 states have internal predecessors, (25), 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 29 [2023-12-18 20:25:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:03,795 INFO L225 Difference]: With dead ends: 73 [2023-12-18 20:25:03,795 INFO L226 Difference]: Without dead ends: 69 [2023-12-18 20:25:03,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 20:25:03,796 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:03,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 124 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 20:25:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-18 20:25:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2023-12-18 20:25:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-18 20:25:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-12-18 20:25:03,815 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 29 [2023-12-18 20:25:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:03,817 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-12-18 20:25:03,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 19 states have internal predecessors, (25), 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) [2023-12-18 20:25:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-12-18 20:25:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 20:25:03,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:03,819 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] [2023-12-18 20:25:03,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 20:25:04,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:04,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:04,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:04,024 INFO L85 PathProgramCache]: Analyzing trace with hash 144098070, now seen corresponding path program 8 times [2023-12-18 20:25:04,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:04,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764746503] [2023-12-18 20:25:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:04,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:04,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487920223] [2023-12-18 20:25:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:25:04,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:04,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:04,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 20:25:04,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:25:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:04,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 20:25:04,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:04,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:04,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764746503] [2023-12-18 20:25:04,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487920223] [2023-12-18 20:25:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487920223] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:04,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:04,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-18 20:25:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156712689] [2023-12-18 20:25:04,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 20:25:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 20:25:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-18 20:25:04,268 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2023-12-18 20:25:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:04,416 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2023-12-18 20:25:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 20:25:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 30 [2023-12-18 20:25:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:04,417 INFO L225 Difference]: With dead ends: 93 [2023-12-18 20:25:04,417 INFO L226 Difference]: Without dead ends: 89 [2023-12-18 20:25:04,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2023-12-18 20:25:04,418 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:04,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 151 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-18 20:25:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2023-12-18 20:25:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 20:25:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2023-12-18 20:25:04,449 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 30 [2023-12-18 20:25:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:04,450 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2023-12-18 20:25:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2023-12-18 20:25:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2023-12-18 20:25:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 20:25:04,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:04,450 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] [2023-12-18 20:25:04,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 20:25:04,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:04,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash -558090261, now seen corresponding path program 9 times [2023-12-18 20:25:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586308299] [2023-12-18 20:25:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:04,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:04,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607789380] [2023-12-18 20:25:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:25:04,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:04,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:04,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 20:25:04,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 20:25:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:04,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 20:25:04,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:04,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:04,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586308299] [2023-12-18 20:25:04,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607789380] [2023-12-18 20:25:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607789380] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:04,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:04,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-18 20:25:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373409360] [2023-12-18 20:25:04,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:04,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 20:25:04,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:04,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 20:25:04,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-18 20:25:04,897 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2023-12-18 20:25:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:05,018 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2023-12-18 20:25:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 20:25:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 30 [2023-12-18 20:25:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:05,019 INFO L225 Difference]: With dead ends: 94 [2023-12-18 20:25:05,019 INFO L226 Difference]: Without dead ends: 83 [2023-12-18 20:25:05,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2023-12-18 20:25:05,019 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:05,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 108 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-18 20:25:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2023-12-18 20:25:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 20:25:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-12-18 20:25:05,032 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 30 [2023-12-18 20:25:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:05,032 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-12-18 20:25:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2023-12-18 20:25:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-12-18 20:25:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 20:25:05,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:05,033 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] [2023-12-18 20:25:05,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:05,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:05,239 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:05,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash 198613773, now seen corresponding path program 10 times [2023-12-18 20:25:05,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:05,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008249463] [2023-12-18 20:25:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:05,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:05,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:05,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899325369] [2023-12-18 20:25:05,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:25:05,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:05,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:05,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:05,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 20:25:05,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:25:05,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:05,418 WARN L260 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-18 20:25:05,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:05,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:05,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:05,521 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 20 [2023-12-18 20:25:05,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:05,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,564 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 28 treesize of output 32 [2023-12-18 20:25:05,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:25:05,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,627 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 37 treesize of output 44 [2023-12-18 20:25:05,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,638 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 [2023-12-18 20:25:05,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,705 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 [2023-12-18 20:25:05,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:05,717 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 46 treesize of output 56 [2023-12-18 20:25:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,398 INFO L349 Elim1Store]: treesize reduction 268, result has 20.0 percent of original size [2023-12-18 20:25:06,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 19 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 118 treesize of output 174 [2023-12-18 20:25:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:06,529 INFO L349 Elim1Store]: treesize reduction 268, result has 20.0 percent of original size [2023-12-18 20:25:06,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 19 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 102 treesize of output 158 [2023-12-18 20:25:07,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:07,708 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 193 treesize of output 137 [2023-12-18 20:25:07,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:07,714 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 116 treesize of output 76 [2023-12-18 20:25:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:07,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008249463] [2023-12-18 20:25:12,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899325369] [2023-12-18 20:25:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899325369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:25:12,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:25:12,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-18 20:25:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714479974] [2023-12-18 20:25:12,469 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 20:25:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 20:25:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=905, Unknown=1, NotChecked=0, Total=1056 [2023-12-18 20:25:12,470 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 21 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) [2023-12-18 20:25:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:13,316 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2023-12-18 20:25:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 20:25:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 21 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) Word has length 31 [2023-12-18 20:25:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:13,317 INFO L225 Difference]: With dead ends: 95 [2023-12-18 20:25:13,317 INFO L226 Difference]: Without dead ends: 91 [2023-12-18 20:25:13,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=228, Invalid=1411, Unknown=1, NotChecked=0, Total=1640 [2023-12-18 20:25:13,319 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:13,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 202 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 20:25:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-18 20:25:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-12-18 20:25:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-18 20:25:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-12-18 20:25:13,339 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 31 [2023-12-18 20:25:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:13,339 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-12-18 20:25:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 21 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) [2023-12-18 20:25:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-12-18 20:25:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 20:25:13,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:13,341 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] [2023-12-18 20:25:13,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:13,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 20:25:13,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:13,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:13,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2113364949, now seen corresponding path program 11 times [2023-12-18 20:25:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629290549] [2023-12-18 20:25:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:13,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:13,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269044575] [2023-12-18 20:25:13,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:25:13,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:13,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:13,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 20:25:13,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-18 20:25:13,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:13,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 20:25:13,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:13,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629290549] [2023-12-18 20:25:14,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269044575] [2023-12-18 20:25:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269044575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:14,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-18 20:25:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594935522] [2023-12-18 20:25:14,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 20:25:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 20:25:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-18 20:25:14,030 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2023-12-18 20:25:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:14,218 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2023-12-18 20:25:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 20:25:14,219 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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 32 [2023-12-18 20:25:14,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:14,219 INFO L225 Difference]: With dead ends: 123 [2023-12-18 20:25:14,219 INFO L226 Difference]: Without dead ends: 119 [2023-12-18 20:25:14,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-12-18 20:25:14,220 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:14,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 217 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-18 20:25:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2023-12-18 20:25:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 73 states have internal predecessors, (83), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-18 20:25:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-12-18 20:25:14,245 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 32 [2023-12-18 20:25:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:14,245 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-12-18 20:25:14,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2023-12-18 20:25:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-12-18 20:25:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 20:25:14,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:14,246 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] [2023-12-18 20:25:14,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 20:25:14,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:14,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1888600566, now seen corresponding path program 12 times [2023-12-18 20:25:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349190776] [2023-12-18 20:25:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:14,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509928677] [2023-12-18 20:25:14,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:25:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:14,462 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:14,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 20:25:14,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-18 20:25:14,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:14,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 20:25:14,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:14,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:14,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:14,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349190776] [2023-12-18 20:25:14,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:14,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509928677] [2023-12-18 20:25:14,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509928677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:14,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-18 20:25:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259954038] [2023-12-18 20:25:14,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 20:25:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 20:25:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-12-18 20:25:14,755 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2023-12-18 20:25:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:14,982 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2023-12-18 20:25:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 20:25:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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 32 [2023-12-18 20:25:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:14,983 INFO L225 Difference]: With dead ends: 124 [2023-12-18 20:25:14,983 INFO L226 Difference]: Without dead ends: 112 [2023-12-18 20:25:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 20:25:14,984 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:14,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 204 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-18 20:25:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2023-12-18 20:25:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 74 states have internal predecessors, (83), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-18 20:25:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2023-12-18 20:25:15,002 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 32 [2023-12-18 20:25:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:15,003 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2023-12-18 20:25:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2023-12-18 20:25:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2023-12-18 20:25:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 20:25:15,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:15,003 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] [2023-12-18 20:25:15,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:15,208 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,SelfDestructingSolverStorable14 [2023-12-18 20:25:15,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:15,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1063263080, now seen corresponding path program 13 times [2023-12-18 20:25:15,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:15,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143508481] [2023-12-18 20:25:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:15,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:15,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366721301] [2023-12-18 20:25:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 20:25:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:15,225 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:15,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 20:25:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:25:15,485 WARN L260 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-18 20:25:15,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:15,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:15,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:15,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:15,582 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 20 [2023-12-18 20:25:15,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,623 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 28 treesize of output 32 [2023-12-18 20:25:15,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:25:15,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,688 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 [2023-12-18 20:25:15,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,703 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 37 treesize of output 44 [2023-12-18 20:25:15,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,772 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 [2023-12-18 20:25:15,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,788 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 46 treesize of output 56 [2023-12-18 20:25:15,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,860 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 [2023-12-18 20:25:15,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:15,878 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 55 treesize of output 68 [2023-12-18 20:25:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,640 INFO L349 Elim1Store]: treesize reduction 352, result has 20.2 percent of original size [2023-12-18 20:25:16,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 116 treesize of output 186 [2023-12-18 20:25:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:16,800 INFO L349 Elim1Store]: treesize reduction 352, result has 20.2 percent of original size [2023-12-18 20:25:16,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 136 treesize of output 206 [2023-12-18 20:25:18,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:18,525 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 295 treesize of output 211 [2023-12-18 20:25:18,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:18,534 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 182 treesize of output 122 [2023-12-18 20:25:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:18,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:19,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:19,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143508481] [2023-12-18 20:25:19,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:19,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366721301] [2023-12-18 20:25:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366721301] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:25:19,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:25:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-18 20:25:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880341426] [2023-12-18 20:25:19,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 20:25:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 20:25:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 20:25:19,179 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-12-18 20:25:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:21,547 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2023-12-18 20:25:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 20:25:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 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 33 [2023-12-18 20:25:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:21,548 INFO L225 Difference]: With dead ends: 117 [2023-12-18 20:25:21,548 INFO L226 Difference]: Without dead ends: 113 [2023-12-18 20:25:21,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=295, Invalid=2255, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 20:25:21,549 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:21,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 347 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-18 20:25:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-18 20:25:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2023-12-18 20:25:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 20:25:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2023-12-18 20:25:21,572 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 33 [2023-12-18 20:25:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:21,573 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2023-12-18 20:25:21,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-12-18 20:25:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2023-12-18 20:25:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 20:25:21,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:21,573 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:21,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:21,779 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,SelfDestructingSolverStorable15 [2023-12-18 20:25:21,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:21,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1918244406, now seen corresponding path program 14 times [2023-12-18 20:25:21,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:21,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783036555] [2023-12-18 20:25:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:21,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225463319] [2023-12-18 20:25:21,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:25:21,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:21,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:21,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 20:25:21,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:25:21,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:21,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 20:25:21,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:22,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:22,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783036555] [2023-12-18 20:25:22,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225463319] [2023-12-18 20:25:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225463319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:22,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-18 20:25:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780648043] [2023-12-18 20:25:22,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 20:25:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 20:25:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-18 20:25:22,125 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2023-12-18 20:25:22,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:22,309 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2023-12-18 20:25:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 20:25:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 34 [2023-12-18 20:25:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:22,310 INFO L225 Difference]: With dead ends: 154 [2023-12-18 20:25:22,310 INFO L226 Difference]: Without dead ends: 150 [2023-12-18 20:25:22,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-12-18 20:25:22,311 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:22,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 180 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-18 20:25:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2023-12-18 20:25:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 20:25:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2023-12-18 20:25:22,337 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 34 [2023-12-18 20:25:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:22,337 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2023-12-18 20:25:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2023-12-18 20:25:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2023-12-18 20:25:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 20:25:22,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:22,338 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:22,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:22,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:22,543 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:22,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1425123787, now seen corresponding path program 15 times [2023-12-18 20:25:22,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:22,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407205926] [2023-12-18 20:25:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:22,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:22,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43070185] [2023-12-18 20:25:22,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:25:22,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:22,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:22,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:22,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 20:25:22,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 20:25:22,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:22,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 20:25:22,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:22,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:22,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407205926] [2023-12-18 20:25:22,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:22,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43070185] [2023-12-18 20:25:22,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43070185] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:22,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:22,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-18 20:25:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772243283] [2023-12-18 20:25:22,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 20:25:22,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 20:25:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-12-18 20:25:22,970 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2023-12-18 20:25:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:23,278 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2023-12-18 20:25:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 20:25:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 34 [2023-12-18 20:25:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:23,280 INFO L225 Difference]: With dead ends: 155 [2023-12-18 20:25:23,280 INFO L226 Difference]: Without dead ends: 142 [2023-12-18 20:25:23,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 20:25:23,289 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 165 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:23,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 169 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-18 20:25:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2023-12-18 20:25:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 90 states have internal predecessors, (101), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 20:25:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2023-12-18 20:25:23,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 34 [2023-12-18 20:25:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:23,340 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2023-12-18 20:25:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2023-12-18 20:25:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2023-12-18 20:25:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 20:25:23,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:23,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:23,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:23,560 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,SelfDestructingSolverStorable17 [2023-12-18 20:25:23,560 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:23,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -455871292, now seen corresponding path program 1 times [2023-12-18 20:25:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:23,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648953612] [2023-12-18 20:25:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:23,567 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136599355] [2023-12-18 20:25:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:23,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:23,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 20:25:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:25:23,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-18 20:25:23,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:23,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:23,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:23,803 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 20 [2023-12-18 20:25:23,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-18 20:25:23,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:23,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:23,861 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 28 treesize of output 32 [2023-12-18 20:25:24,167 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-18 20:25:24,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-18 20:25:24,189 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2023-12-18 20:25:24,189 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 16 case distinctions, treesize of input 62 treesize of output 75 [2023-12-18 20:25:24,505 INFO L349 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-12-18 20:25:24,505 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 16 case distinctions, treesize of input 62 treesize of output 71 [2023-12-18 20:25:24,521 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-18 20:25:24,521 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 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-18 20:25:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:24,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648953612] [2023-12-18 20:25:25,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136599355] [2023-12-18 20:25:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136599355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:25:25,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:25:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-18 20:25:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971685746] [2023-12-18 20:25:25,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:25,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 20:25:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 20:25:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-12-18 20:25:25,145 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 20 states have internal predecessors, (29), 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) [2023-12-18 20:25:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:26,070 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2023-12-18 20:25:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 20:25:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 20 states have internal predecessors, (29), 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 35 [2023-12-18 20:25:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:26,071 INFO L225 Difference]: With dead ends: 121 [2023-12-18 20:25:26,071 INFO L226 Difference]: Without dead ends: 96 [2023-12-18 20:25:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 20:25:26,072 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:26,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 220 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 20:25:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-18 20:25:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2023-12-18 20:25:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-18 20:25:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-12-18 20:25:26,097 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 35 [2023-12-18 20:25:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:26,097 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-12-18 20:25:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 20 states have internal predecessors, (29), 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) [2023-12-18 20:25:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-12-18 20:25:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 20:25:26,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:26,098 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:26,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:26,309 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:26,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash -637424659, now seen corresponding path program 16 times [2023-12-18 20:25:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633968034] [2023-12-18 20:25:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:26,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:26,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:26,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272338701] [2023-12-18 20:25:26,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:25:26,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:26,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:26,319 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:26,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 20:25:26,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:25:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:26,712 WARN L260 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-18 20:25:26,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:26,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:26,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:26,768 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 20 [2023-12-18 20:25:26,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:26,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:25:26,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,827 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 28 treesize of output 32 [2023-12-18 20:25:26,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,866 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 [2023-12-18 20:25:26,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,881 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 37 treesize of output 44 [2023-12-18 20:25:26,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,926 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 46 treesize of output 56 [2023-12-18 20:25:26,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,939 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 [2023-12-18 20:25:26,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:26,995 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 [2023-12-18 20:25:27,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:27,010 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 55 treesize of output 68 [2023-12-18 20:25:27,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:27,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 80 [2023-12-18 20:25:27,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:27,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-18 20:25:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,083 INFO L349 Elim1Store]: treesize reduction 436, result has 20.3 percent of original size [2023-12-18 20:25:28,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 30 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 130 case distinctions, treesize of input 154 treesize of output 238 [2023-12-18 20:25:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:28,336 INFO L349 Elim1Store]: treesize reduction 436, result has 20.3 percent of original size [2023-12-18 20:25:28,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 30 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 130 case distinctions, treesize of input 130 treesize of output 214 [2023-12-18 20:25:31,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:31,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 420 treesize of output 316 [2023-12-18 20:25:31,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:31,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 323 treesize of output 203 [2023-12-18 20:25:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:31,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633968034] [2023-12-18 20:25:37,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272338701] [2023-12-18 20:25:37,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272338701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 20:25:37,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 20:25:37,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-18 20:25:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8443696] [2023-12-18 20:25:37,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:37,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-18 20:25:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-18 20:25:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1281, Unknown=1, NotChecked=0, Total=1482 [2023-12-18 20:25:37,007 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-12-18 20:25:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:39,006 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2023-12-18 20:25:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 20:25:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 25 states have internal predecessors, (31), 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 35 [2023-12-18 20:25:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:39,007 INFO L225 Difference]: With dead ends: 121 [2023-12-18 20:25:39,008 INFO L226 Difference]: Without dead ends: 117 [2023-12-18 20:25:39,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=282, Invalid=1879, Unknown=1, NotChecked=0, Total=2162 [2023-12-18 20:25:39,010 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:39,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 289 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 20:25:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-18 20:25:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2023-12-18 20:25:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 20:25:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2023-12-18 20:25:39,045 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 35 [2023-12-18 20:25:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2023-12-18 20:25:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-12-18 20:25:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2023-12-18 20:25:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 20:25:39,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:39,046 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:39,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-18 20:25:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:39,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:39,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash -151917045, now seen corresponding path program 17 times [2023-12-18 20:25:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16892144] [2023-12-18 20:25:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:39,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:39,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438922319] [2023-12-18 20:25:39,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:25:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:39,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:39,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 20:25:39,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 20:25:39,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:39,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 20:25:39,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:39,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:40,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16892144] [2023-12-18 20:25:40,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438922319] [2023-12-18 20:25:40,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438922319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:40,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:40,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-12-18 20:25:40,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718800143] [2023-12-18 20:25:40,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 20:25:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 20:25:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-12-18 20:25:40,033 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2023-12-18 20:25:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:40,266 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2023-12-18 20:25:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 20:25:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 36 [2023-12-18 20:25:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:40,267 INFO L225 Difference]: With dead ends: 161 [2023-12-18 20:25:40,267 INFO L226 Difference]: Without dead ends: 157 [2023-12-18 20:25:40,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 20:25:40,267 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:40,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 222 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-18 20:25:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2023-12-18 20:25:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 92 states have internal predecessors, (104), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 20:25:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2023-12-18 20:25:40,300 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 36 [2023-12-18 20:25:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:40,300 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2023-12-18 20:25:40,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2023-12-18 20:25:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2023-12-18 20:25:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-18 20:25:40,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:40,301 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:40,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:40,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:40,509 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:40,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:40,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1741212950, now seen corresponding path program 18 times [2023-12-18 20:25:40,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:40,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450062339] [2023-12-18 20:25:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:40,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:40,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031189794] [2023-12-18 20:25:40,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:25:40,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:40,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:40,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:40,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 20:25:40,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 20:25:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:40,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 20:25:40,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:25:40,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:25:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:25:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:25:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450062339] [2023-12-18 20:25:41,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:25:41,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031189794] [2023-12-18 20:25:41,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031189794] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:25:41,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:25:41,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-12-18 20:25:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288852498] [2023-12-18 20:25:41,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:25:41,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 20:25:41,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:25:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 20:25:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-12-18 20:25:41,098 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2023-12-18 20:25:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:25:41,450 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2023-12-18 20:25:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-18 20:25:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 36 [2023-12-18 20:25:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:25:41,451 INFO L225 Difference]: With dead ends: 162 [2023-12-18 20:25:41,451 INFO L226 Difference]: Without dead ends: 148 [2023-12-18 20:25:41,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=729, Invalid=2463, Unknown=0, NotChecked=0, Total=3192 [2023-12-18 20:25:41,453 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 149 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:25:41,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 208 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:25:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-18 20:25:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 114. [2023-12-18 20:25:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-18 20:25:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2023-12-18 20:25:41,491 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 36 [2023-12-18 20:25:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:25:41,491 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2023-12-18 20:25:41,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2023-12-18 20:25:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2023-12-18 20:25:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 20:25:41,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:25:41,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:25:41,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 20:25:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:41,698 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:25:41,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:25:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash 945266881, now seen corresponding path program 2 times [2023-12-18 20:25:41,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:25:41,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686904808] [2023-12-18 20:25:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:25:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:25:41,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:25:41,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466456907] [2023-12-18 20:25:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:25:41,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:25:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:25:41,707 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:25:41,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 20:25:41,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:25:41,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:25:41,945 WARN L260 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-18 20:25:41,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:25:41,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:41,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:25:42,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:25:42,018 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 20 [2023-12-18 20:25:42,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:42,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 20:25:42,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:42,066 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 28 treesize of output 32 [2023-12-18 20:25:42,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:42,111 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 [2023-12-18 20:25:42,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:25:42,125 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 37 treesize of output 44 [2023-12-18 20:25:42,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,707 INFO L349 Elim1Store]: treesize reduction 187, result has 18.3 percent of original size [2023-12-18 20:25:42,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 88 treesize of output 127 [2023-12-18 20:25:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:42,810 INFO L349 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2023-12-18 20:25:42,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 100 treesize of output 136 [2023-12-18 20:25:43,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:43,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:43,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:43,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,343 INFO L349 Elim1Store]: treesize reduction 1257, result has 19.0 percent of original size [2023-12-18 20:25:45,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 15 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 182 case distinctions, treesize of input 338 treesize of output 584 [2023-12-18 20:25:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:25:46,734 INFO L349 Elim1Store]: treesize reduction 1254, result has 19.2 percent of original size [2023-12-18 20:25:46,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 21 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 182 case distinctions, treesize of input 268 treesize of output 517 [2023-12-18 20:28:40,727 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 1223 DAG size of output: 1385 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 20:30:10,766 WARN L293 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 1766 DAG size of output: 1770 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-18 20:32:50,988 WARN L293 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 2834 DAG size of output: 2246 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-18 20:38:35,116 WARN L293 SmtUtils]: Spent 42.17s on a formula simplification that was a NOOP. DAG size: 2215 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-18 20:39:21,152 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 20:39:21,171 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 20:39:21,184 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 20:39:21,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-18 20:39:21,378 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,SelfDestructingSolverStorable22 [2023-12-18 20:39:21,378 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 38 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-208-7-24-7-8-6-4-2-1 term,while PolyPacSimplificationTermWalker was simplifying 5 xjuncts wrt. a ∧-219-7-24-7-8-6-4-2-1 context. [2023-12-18 20:39:21,382 INFO L445 BasicCegarLoop]: Path program histogram: [18, 2, 1, 1, 1] [2023-12-18 20:39:21,386 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 20:39:21,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 08:39:21 BoogieIcfgContainer [2023-12-18 20:39:21,392 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 20:39:21,393 INFO L158 Benchmark]: Toolchain (without parser) took 866518.71ms. Allocated memory was 242.2MB in the beginning and 1.0GB in the end (delta: 807.4MB). Free memory was 192.3MB in the beginning and 466.1MB in the end (delta: -273.7MB). Peak memory consumption was 620.5MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,393 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 192.9MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 20:39:21,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.48ms. Allocated memory is still 242.2MB. Free memory was 192.2MB in the beginning and 180.9MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,394 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.11ms. Allocated memory is still 242.2MB. Free memory was 180.7MB in the beginning and 179.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,395 INFO L158 Benchmark]: Boogie Preprocessor took 38.88ms. Allocated memory is still 242.2MB. Free memory was 179.1MB in the beginning and 177.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,398 INFO L158 Benchmark]: RCFGBuilder took 285.58ms. Allocated memory is still 242.2MB. Free memory was 177.0MB in the beginning and 163.6MB in the end (delta: 13.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,399 INFO L158 Benchmark]: TraceAbstraction took 865966.19ms. Allocated memory was 242.2MB in the beginning and 1.0GB in the end (delta: 807.4MB). Free memory was 163.0MB in the beginning and 466.1MB in the end (delta: -303.1MB). Peak memory consumption was 591.1MB. Max. memory is 8.0GB. [2023-12-18 20:39:21,403 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 192.9MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.48ms. Allocated memory is still 242.2MB. Free memory was 192.2MB in the beginning and 180.9MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.11ms. Allocated memory is still 242.2MB. Free memory was 180.7MB in the beginning and 179.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.88ms. Allocated memory is still 242.2MB. Free memory was 179.1MB in the beginning and 177.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 285.58ms. Allocated memory is still 242.2MB. Free memory was 177.0MB in the beginning and 163.6MB in the end (delta: 13.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 865966.19ms. Allocated memory was 242.2MB in the beginning and 1.0GB in the end (delta: 807.4MB). Free memory was 163.0MB in the beginning and 466.1MB in the end (delta: -303.1MB). Peak memory consumption was 591.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 33]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 33). Cancelled while NwaCegarLoop was analyzing trace of length 38 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-208-7-24-7-8-6-4-2-1 term,while PolyPacSimplificationTermWalker was simplifying 5 xjuncts wrt. a ∧-219-7-24-7-8-6-4-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 865.9s, OverallIterations: 23, TraceHistogramMax: 8, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1300 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1268 mSDsluCounter, 3180 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2638 mSDsCounter, 406 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5026 IncrementalHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 406 mSolverCounterUnsat, 542 mSDtfsCounter, 5026 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1252 GetRequests, 562 SyntacticMatches, 75 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=22, InterpolantAutomatonStates: 425, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 312 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 28.3s InterpolantComputationTime, 641 NumberOfCodeBlocks, 638 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 1000 ConstructedInterpolants, 48 QuantifiedInterpolants, 18349 SizeOfPredicates, 126 NumberOfNonLiveVariables, 3200 ConjunctsInSsa, 710 ConjunctsInUnsatCore, 35 InterpolantComputations, 3 PerfectInterpolantSequences, 539/1117 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown