/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/array27_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 20:18:14,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 20:18:14,071 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 20:18:14,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 20:18:14,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 20:18:14,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 20:18:14,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 20:18:14,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 20:18:14,103 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 20:18:14,104 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 20:18:14,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 20:18:14,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 20:18:14,104 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 20:18:14,105 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 20:18:14,105 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 20:18:14,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 20:18:14,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 20:18:14,106 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 20:18:14,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 20:18:14,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 20:18:14,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 20:18:14,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 20:18:14,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 20:18:14,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 20:18:14,113 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 20:18:14,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 20:18:14,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 20:18:14,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 20:18:14,114 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 20:18:14,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 20:18:14,115 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 20:18:14,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 20:18:14,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:18:14,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 20:18:14,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 20:18:14,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 20:18:14,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 20:18:14,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 20:18:14,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 20:18:14,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 20:18:14,116 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 20:18:14,118 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 20:18:14,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 20:18:14,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 20:18:14,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 20:18:14,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 20:18:14,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 20:18:14,297 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 20:18:14,297 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 20:18:14,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array27_pattern.c [2023-12-18 20:18:15,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 20:18:15,450 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 20:18:15,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array27_pattern.c [2023-12-18 20:18:15,457 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca8764bc/98d122ddd26b4d01ad022cacbe89d870/FLAG58f77239f [2023-12-18 20:18:15,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ca8764bc/98d122ddd26b4d01ad022cacbe89d870 [2023-12-18 20:18:15,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 20:18:15,474 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 20:18:15,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 20:18:15,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 20:18:15,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 20:18:15,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d47a13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15, skipping insertion in model container [2023-12-18 20:18:15,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 20:18:15,582 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/array27_pattern.c[1253,1266] [2023-12-18 20:18:15,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:18:15,604 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 20:18:15,614 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/array27_pattern.c[1253,1266] [2023-12-18 20:18:15,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:18:15,644 INFO L206 MainTranslator]: Completed translation [2023-12-18 20:18:15,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15 WrapperNode [2023-12-18 20:18:15,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 20:18:15,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 20:18:15,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 20:18:15,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 20:18:15,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,684 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-12-18 20:18:15,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 20:18:15,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 20:18:15,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 20:18:15,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 20:18:15,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,702 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,718 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-18 20:18:15,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 20:18:15,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 20:18:15,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 20:18:15,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 20:18:15,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (1/1) ... [2023-12-18 20:18:15,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:18:15,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:15,765 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 20:18:15,784 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 20:18:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 20:18:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 20:18:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 20:18:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 20:18:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 20:18:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 20:18:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 20:18:15,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 20:18:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 20:18:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 20:18:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 20:18:15,835 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 20:18:15,836 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 20:18:15,940 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 20:18:15,956 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 20:18:15,956 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-18 20:18:15,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:18:15 BoogieIcfgContainer [2023-12-18 20:18:15,956 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 20:18:15,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 20:18:15,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 20:18:15,960 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 20:18:15,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:18:15" (1/3) ... [2023-12-18 20:18:15,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eba9fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:18:15, skipping insertion in model container [2023-12-18 20:18:15,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:18:15" (2/3) ... [2023-12-18 20:18:15,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eba9fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:18:15, skipping insertion in model container [2023-12-18 20:18:15,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:18:15" (3/3) ... [2023-12-18 20:18:15,962 INFO L112 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2023-12-18 20:18:15,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 20:18:15,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 20:18:16,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 20:18:16,006 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;@557169e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 20:18:16,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 20:18:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 20:18:16,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:16,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:16,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:16,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash 77099514, now seen corresponding path program 1 times [2023-12-18 20:18:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:16,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944881805] [2023-12-18 20:18:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:16,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944881805] [2023-12-18 20:18:16,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 20:18:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167190381] [2023-12-18 20:18:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:16,114 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 20:18:16,178 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 20:18:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:16,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 20:18:16,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:16,217 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 20:18:16,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:18:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167190381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:18:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:18:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 20:18:16,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056696922] [2023-12-18 20:18:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:18:16,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 20:18:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 20:18:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 20:18:16,241 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:16,256 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2023-12-18 20:18:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 20:18:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-18 20:18:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:16,262 INFO L225 Difference]: With dead ends: 34 [2023-12-18 20:18:16,262 INFO L226 Difference]: Without dead ends: 16 [2023-12-18 20:18:16,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 20:18:16,267 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:18:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-18 20:18:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-18 20:18:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-18 20:18:16,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2023-12-18 20:18:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:16,289 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-18 20:18:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-18 20:18:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 20:18:16,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:16,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:16,297 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 20:18:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-18 20:18:16,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:16,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1391253823, now seen corresponding path program 1 times [2023-12-18 20:18:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163873779] [2023-12-18 20:18:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:16,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:16,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591507968] [2023-12-18 20:18:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:16,507 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 20:18:16,524 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 20:18:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:16,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 20:18:16,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:16,619 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 20:18:16,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:18:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163873779] [2023-12-18 20:18:16,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591507968] [2023-12-18 20:18:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591507968] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:18:16,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:18:16,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:18:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257795717] [2023-12-18 20:18:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:18:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:18:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:18:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:18:16,622 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:16,673 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-12-18 20:18:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 20:18:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-18 20:18:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:16,674 INFO L225 Difference]: With dead ends: 32 [2023-12-18 20:18:16,674 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 20:18:16,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 20:18:16,677 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:16,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:18:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 20:18:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-12-18 20:18:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-18 20:18:16,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2023-12-18 20:18:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:16,688 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-18 20:18:16,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-18 20:18:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 20:18:16,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:16,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:16,693 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 20:18:16,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-18 20:18:16,894 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:16,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1398282665, now seen corresponding path program 1 times [2023-12-18 20:18:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200852057] [2023-12-18 20:18:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:16,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612883960] [2023-12-18 20:18:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:16,916 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 20:18:16,917 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 20:18:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:16,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:18:16,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:18:16,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:18:16,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200852057] [2023-12-18 20:18:16,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612883960] [2023-12-18 20:18:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612883960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:18:16,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:18:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 20:18:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877001645] [2023-12-18 20:18:16,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:18:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 20:18:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 20:18:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 20:18:16,972 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:17,035 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-12-18 20:18:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 20:18:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 20:18:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:17,036 INFO L225 Difference]: With dead ends: 36 [2023-12-18 20:18:17,036 INFO L226 Difference]: Without dead ends: 22 [2023-12-18 20:18:17,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:18:17,038 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:17,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:18:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-18 20:18:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-12-18 20:18:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 20:18:17,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2023-12-18 20:18:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:17,056 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 20:18:17,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 20:18:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 20:18:17,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:17,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:17,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 20:18:17,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:17,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:17,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1830707515, now seen corresponding path program 1 times [2023-12-18 20:18:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:17,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165904730] [2023-12-18 20:18:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:17,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:17,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534155144] [2023-12-18 20:18:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:17,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:17,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:17,276 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 20:18:17,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 20:18:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:17,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-18 20:18:17,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:17,412 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 20:18:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:18:17,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:17,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-12-18 20:18:17,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-12-18 20:18:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:18:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165904730] [2023-12-18 20:18:17,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534155144] [2023-12-18 20:18:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534155144] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:17,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2023-12-18 20:18:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256432676] [2023-12-18 20:18:17,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 20:18:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 20:18:17,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-12-18 20:18:17,832 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:18,677 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2023-12-18 20:18:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 20:18:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-18 20:18:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:18,679 INFO L225 Difference]: With dead ends: 91 [2023-12-18 20:18:18,679 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 20:18:18,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1682, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 20:18:18,680 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 167 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:18,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 37 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 20:18:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 20:18:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2023-12-18 20:18:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2023-12-18 20:18:18,692 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 19 [2023-12-18 20:18:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:18,693 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2023-12-18 20:18:18,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2023-12-18 20:18:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 20:18:18,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:18,693 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:18,700 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 20:18:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:18,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:18,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1164410710, now seen corresponding path program 2 times [2023-12-18 20:18:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359357451] [2023-12-18 20:18:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:18,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:18,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290251244] [2023-12-18 20:18:18,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:18:18,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:18,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:18,926 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 20:18:18,960 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 20:18:18,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:18:18,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:18,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:18:18,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:18:18,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:18:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359357451] [2023-12-18 20:18:19,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:19,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290251244] [2023-12-18 20:18:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290251244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:19,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:19,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:18:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6433940] [2023-12-18 20:18:19,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:19,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:18:19,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:18:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:18:19,027 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:19,105 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2023-12-18 20:18:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 20:18:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-18 20:18:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:19,108 INFO L225 Difference]: With dead ends: 154 [2023-12-18 20:18:19,108 INFO L226 Difference]: Without dead ends: 98 [2023-12-18 20:18:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:18:19,111 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:19,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:18:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-18 20:18:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2023-12-18 20:18:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-12-18 20:18:19,139 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 20 [2023-12-18 20:18:19,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:19,139 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-12-18 20:18:19,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-12-18 20:18:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 20:18:19,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:19,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:19,147 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 20:18:19,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:19,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:19,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1647128868, now seen corresponding path program 1 times [2023-12-18 20:18:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:19,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326237126] [2023-12-18 20:18:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:19,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:19,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:19,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014524696] [2023-12-18 20:18:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:19,357 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 20:18:19,379 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 20:18:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:19,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:18:19,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:19,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326237126] [2023-12-18 20:18:19,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014524696] [2023-12-18 20:18:19,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014524696] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:19,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:19,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-18 20:18:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442528525] [2023-12-18 20:18:19,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:19,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 20:18:19,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 20:18:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:18:19,458 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:19,642 INFO L93 Difference]: Finished difference Result 165 states and 219 transitions. [2023-12-18 20:18:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-18 20:18:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 20:18:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:19,643 INFO L225 Difference]: With dead ends: 165 [2023-12-18 20:18:19,643 INFO L226 Difference]: Without dead ends: 102 [2023-12-18 20:18:19,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-12-18 20:18:19,645 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:19,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:18:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-18 20:18:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2023-12-18 20:18:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2023-12-18 20:18:19,668 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 22 [2023-12-18 20:18:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:19,669 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2023-12-18 20:18:19,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2023-12-18 20:18:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 20:18:19,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:19,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:19,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 20:18:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:19,874 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:19,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1175902674, now seen corresponding path program 1 times [2023-12-18 20:18:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446456952] [2023-12-18 20:18:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:19,886 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816816674] [2023-12-18 20:18:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:19,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:19,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:19,887 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 20:18:19,896 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 20:18:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:19,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:18:19,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:19,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:19,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446456952] [2023-12-18 20:18:19,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816816674] [2023-12-18 20:18:19,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816816674] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:19,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:18:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547144007] [2023-12-18 20:18:20,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:20,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:18:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:18:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:18:20,000 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:20,107 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2023-12-18 20:18:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 20:18:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-18 20:18:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:20,108 INFO L225 Difference]: With dead ends: 91 [2023-12-18 20:18:20,108 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 20:18:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-12-18 20:18:20,109 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:18:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 20:18:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2023-12-18 20:18:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-12-18 20:18:20,128 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 23 [2023-12-18 20:18:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:20,129 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-12-18 20:18:20,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-12-18 20:18:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 20:18:20,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:20,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:20,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 20:18:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:20,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:20,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1961030341, now seen corresponding path program 2 times [2023-12-18 20:18:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247804343] [2023-12-18 20:18:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:20,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:20,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061020812] [2023-12-18 20:18:20,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:18:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:20,345 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 20:18:20,348 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 20:18:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:18:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:20,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 20:18:20,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:20,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 20:18:20,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247804343] [2023-12-18 20:18:20,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061020812] [2023-12-18 20:18:20,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061020812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:20,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:20,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:18:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801582988] [2023-12-18 20:18:20,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:20,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:18:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:18:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:18:20,459 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:20,531 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2023-12-18 20:18:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 20:18:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-18 20:18:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:20,532 INFO L225 Difference]: With dead ends: 67 [2023-12-18 20:18:20,532 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 20:18:20,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-12-18 20:18:20,532 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:20,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:18:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 20:18:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-12-18 20:18:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-12-18 20:18:20,539 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2023-12-18 20:18:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:20,540 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-12-18 20:18:20,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-12-18 20:18:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 20:18:20,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:20,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:20,566 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 20:18:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-18 20:18:20,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -637697851, now seen corresponding path program 3 times [2023-12-18 20:18:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718699337] [2023-12-18 20:18:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:20,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216112391] [2023-12-18 20:18:20,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:18:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:20,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:20,753 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 20:18:20,776 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 20:18:20,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 20:18:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:20,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-18 20:18:20,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:20,885 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 20:18:20,953 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 20:18:21,032 INFO L349 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2023-12-18 20:18:21,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2023-12-18 20:18:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,216 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 20:18:21,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 71 [2023-12-18 20:18:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:21,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:18:21,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 44 [2023-12-18 20:18:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:18:21,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:22,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-12-18 20:18:23,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:18:23,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 340 [2023-12-18 20:18:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:18:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718699337] [2023-12-18 20:18:23,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:23,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216112391] [2023-12-18 20:18:23,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216112391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:23,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-12-18 20:18:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439650966] [2023-12-18 20:18:23,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:23,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-18 20:18:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-18 20:18:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 20:18:23,104 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:45,751 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2023-12-18 20:18:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-12-18 20:18:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-18 20:18:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:45,752 INFO L225 Difference]: With dead ends: 258 [2023-12-18 20:18:45,753 INFO L226 Difference]: Without dead ends: 218 [2023-12-18 20:18:45,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16757 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=5074, Invalid=39236, Unknown=0, NotChecked=0, Total=44310 [2023-12-18 20:18:45,763 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 301 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:45,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 100 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-18 20:18:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-18 20:18:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 137. [2023-12-18 20:18:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3161764705882353) internal successors, (179), 136 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2023-12-18 20:18:45,800 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 37 [2023-12-18 20:18:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:45,800 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2023-12-18 20:18:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2023-12-18 20:18:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 20:18:45,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:45,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:45,808 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 20:18:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:46,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:46,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1455346301, now seen corresponding path program 4 times [2023-12-18 20:18:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:46,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965336194] [2023-12-18 20:18:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:46,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:46,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754689621] [2023-12-18 20:18:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:18:46,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:46,013 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 20:18:46,017 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 20:18:46,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:18:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:46,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 20:18:46,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 20:18:46,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-18 20:18:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965336194] [2023-12-18 20:18:46,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754689621] [2023-12-18 20:18:46,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754689621] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:46,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:46,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 20:18:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501499274] [2023-12-18 20:18:46,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 20:18:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 20:18:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:18:46,152 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:46,265 INFO L93 Difference]: Finished difference Result 261 states and 338 transitions. [2023-12-18 20:18:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 20:18:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-18 20:18:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:46,266 INFO L225 Difference]: With dead ends: 261 [2023-12-18 20:18:46,266 INFO L226 Difference]: Without dead ends: 174 [2023-12-18 20:18:46,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-18 20:18:46,267 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:46,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 43 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:18:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-18 20:18:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2023-12-18 20:18:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2733333333333334) internal successors, (191), 150 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2023-12-18 20:18:46,307 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 37 [2023-12-18 20:18:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:46,308 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2023-12-18 20:18:46,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2023-12-18 20:18:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 20:18:46,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:46,309 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:46,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-18 20:18:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 20:18:46,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:46,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1459150506, now seen corresponding path program 5 times [2023-12-18 20:18:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:46,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349783728] [2023-12-18 20:18:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:46,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:46,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55259260] [2023-12-18 20:18:46,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:18:46,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:46,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:46,533 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 20:18:46,535 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 20:18:46,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 20:18:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:46,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 20:18:46,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:18:46,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 20:18:46,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:46,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349783728] [2023-12-18 20:18:46,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:46,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55259260] [2023-12-18 20:18:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55259260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:46,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:46,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-12-18 20:18:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018042249] [2023-12-18 20:18:46,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 20:18:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 20:18:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-12-18 20:18:46,804 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:47,691 INFO L93 Difference]: Finished difference Result 470 states and 590 transitions. [2023-12-18 20:18:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-18 20:18:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-18 20:18:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:47,694 INFO L225 Difference]: With dead ends: 470 [2023-12-18 20:18:47,694 INFO L226 Difference]: Without dead ends: 294 [2023-12-18 20:18:47,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1456, Invalid=4706, Unknown=0, NotChecked=0, Total=6162 [2023-12-18 20:18:47,696 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 157 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:47,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 42 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 20:18:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-12-18 20:18:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 222. [2023-12-18 20:18:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.2262443438914028) internal successors, (271), 221 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 271 transitions. [2023-12-18 20:18:47,762 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 271 transitions. Word has length 38 [2023-12-18 20:18:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:47,762 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 271 transitions. [2023-12-18 20:18:47,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 271 transitions. [2023-12-18 20:18:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 20:18:47,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:47,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:47,769 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 20:18:47,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 20:18:47,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:47,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash 924752363, now seen corresponding path program 6 times [2023-12-18 20:18:47,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:47,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079140371] [2023-12-18 20:18:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:47,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:47,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:47,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063260340] [2023-12-18 20:18:47,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:18:47,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:47,991 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 20:18:47,993 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 20:18:48,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 20:18:48,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:48,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 20:18:48,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 20:18:48,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 20:18:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079140371] [2023-12-18 20:18:48,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063260340] [2023-12-18 20:18:48,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063260340] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:48,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:48,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-12-18 20:18:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154862065] [2023-12-18 20:18:48,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:48,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 20:18:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 20:18:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 20:18:48,304 INFO L87 Difference]: Start difference. First operand 222 states and 271 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:49,004 INFO L93 Difference]: Finished difference Result 318 states and 384 transitions. [2023-12-18 20:18:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 20:18:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-18 20:18:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:49,005 INFO L225 Difference]: With dead ends: 318 [2023-12-18 20:18:49,005 INFO L226 Difference]: Without dead ends: 242 [2023-12-18 20:18:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=713, Invalid=2479, Unknown=0, NotChecked=0, Total=3192 [2023-12-18 20:18:49,006 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:49,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 44 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 20:18:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-18 20:18:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 193. [2023-12-18 20:18:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1614583333333333) internal successors, (223), 192 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 223 transitions. [2023-12-18 20:18:49,051 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 223 transitions. Word has length 41 [2023-12-18 20:18:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:49,051 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 223 transitions. [2023-12-18 20:18:49,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 223 transitions. [2023-12-18 20:18:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-18 20:18:49,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:49,052 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:49,072 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 20:18:49,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 20:18:49,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:49,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1753201201, now seen corresponding path program 7 times [2023-12-18 20:18:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:49,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821849002] [2023-12-18 20:18:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:49,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:49,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:49,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662955503] [2023-12-18 20:18:49,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 20:18:49,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:49,289 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 20:18:49,290 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 20:18:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:18:49,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:18:49,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 20:18:49,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 11 proven. 70 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 20:18:49,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:49,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821849002] [2023-12-18 20:18:49,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:49,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662955503] [2023-12-18 20:18:49,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662955503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:49,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:49,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 20:18:49,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826872270] [2023-12-18 20:18:49,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 20:18:49,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 20:18:49,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:18:49,484 INFO L87 Difference]: Start difference. First operand 193 states and 223 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:49,623 INFO L93 Difference]: Finished difference Result 242 states and 280 transitions. [2023-12-18 20:18:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 20:18:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-12-18 20:18:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:49,623 INFO L225 Difference]: With dead ends: 242 [2023-12-18 20:18:49,624 INFO L226 Difference]: Without dead ends: 142 [2023-12-18 20:18:49,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-12-18 20:18:49,624 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:49,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 28 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:18:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-18 20:18:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 73. [2023-12-18 20:18:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-12-18 20:18:49,643 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 56 [2023-12-18 20:18:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:49,644 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-12-18 20:18:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-12-18 20:18:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-18 20:18:49,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:49,644 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:49,652 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 20:18:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 20:18:49,849 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:49,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1732390210, now seen corresponding path program 8 times [2023-12-18 20:18:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:49,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254566609] [2023-12-18 20:18:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:49,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:49,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:49,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297642388] [2023-12-18 20:18:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:18:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:49,857 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 20:18:49,864 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 20:18:49,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:18:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:49,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 20:18:49,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-18 20:18:50,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:18:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-18 20:18:50,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:18:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254566609] [2023-12-18 20:18:50,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:18:50,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297642388] [2023-12-18 20:18:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297642388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:18:50,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:18:50,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 20:18:50,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014522831] [2023-12-18 20:18:50,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:18:50,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 20:18:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:18:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 20:18:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:18:50,092 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:18:50,291 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2023-12-18 20:18:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 20:18:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-18 20:18:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:18:50,291 INFO L225 Difference]: With dead ends: 95 [2023-12-18 20:18:50,292 INFO L226 Difference]: Without dead ends: 91 [2023-12-18 20:18:50,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2023-12-18 20:18:50,297 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:18:50,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 15 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:18:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-18 20:18:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2023-12-18 20:18:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2023-12-18 20:18:50,319 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 57 [2023-12-18 20:18:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:18:50,319 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2023-12-18 20:18:50,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:18:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2023-12-18 20:18:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-18 20:18:50,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:18:50,320 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:18:50,324 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 20:18:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:50,525 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:18:50,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:18:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1068034807, now seen corresponding path program 9 times [2023-12-18 20:18:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:18:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28639254] [2023-12-18 20:18:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:18:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:18:50,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:18:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757928567] [2023-12-18 20:18:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:18:50,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:18:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:18:50,548 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 20:18:50,550 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 20:18:51,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-18 20:18:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:18:51,109 WARN L260 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-18 20:18:51,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:18:51,167 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 20:18:51,235 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 20:18:51,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:18:51,304 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 20:18:51,407 INFO L349 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2023-12-18 20:18:51,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 70 [2023-12-18 20:18:51,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,590 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2023-12-18 20:18:51,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 81 treesize of output 89 [2023-12-18 20:18:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:51,831 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-12-18 20:18:51,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 72 treesize of output 83 [2023-12-18 20:18:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:52,383 INFO L349 Elim1Store]: treesize reduction 159, result has 43.0 percent of original size [2023-12-18 20:18:52,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 99 treesize of output 157 [2023-12-18 20:18:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:53,359 INFO L349 Elim1Store]: treesize reduction 224, result has 34.9 percent of original size [2023-12-18 20:18:53,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 156 treesize of output 217 [2023-12-18 20:18:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:18:54,436 INFO L349 Elim1Store]: treesize reduction 143, result has 18.3 percent of original size [2023-12-18 20:18:54,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 187 treesize of output 213 [2023-12-18 20:19:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:19:00,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:19:00,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 97 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 191 treesize of output 155 [2023-12-18 20:19:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:19:01,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:19:04,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 104 [2023-12-18 20:19:04,252 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:19:04,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3588 treesize of output 3300 [2023-12-18 20:19:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:19:04,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:19:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28639254] [2023-12-18 20:19:04,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:19:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757928567] [2023-12-18 20:19:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757928567] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:19:04,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:19:04,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2023-12-18 20:19:04,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280794170] [2023-12-18 20:19:04,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:19:04,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-12-18 20:19:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:19:04,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-12-18 20:19:04,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1235, Invalid=6955, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 20:19:04,494 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 91 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 91 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:19:47,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-18 20:21:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:22,297 INFO L93 Difference]: Finished difference Result 440 states and 529 transitions. [2023-12-18 20:21:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2023-12-18 20:21:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 91 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-18 20:21:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:22,298 INFO L225 Difference]: With dead ends: 440 [2023-12-18 20:21:22,298 INFO L226 Difference]: Without dead ends: 424 [2023-12-18 20:21:22,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44601 ImplicationChecksByTransitivity, 127.6s TimeCoverageRelationStatistics Valid=17608, Invalid=100384, Unknown=0, NotChecked=0, Total=117992 [2023-12-18 20:21:22,309 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 910 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3514 mSolverCounterSat, 1334 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 4849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1334 IncrementalHoareTripleChecker+Valid, 3514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:22,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 110 Invalid, 4849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1334 Valid, 3514 Invalid, 1 Unknown, 0 Unchecked, 19.0s Time] [2023-12-18 20:21:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-12-18 20:21:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 253. [2023-12-18 20:21:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.2142857142857142) internal successors, (306), 252 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 306 transitions. [2023-12-18 20:21:22,486 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 306 transitions. Word has length 63 [2023-12-18 20:21:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:22,486 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 306 transitions. [2023-12-18 20:21:22,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 91 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 306 transitions. [2023-12-18 20:21:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 20:21:22,490 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:22,490 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:22,500 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 20:21:22,696 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,SelfDestructingSolverStorable14 [2023-12-18 20:21:22,696 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:22,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1890463155, now seen corresponding path program 10 times [2023-12-18 20:21:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610856311] [2023-12-18 20:21:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:22,704 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327652983] [2023-12-18 20:21:22,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 20:21:22,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:22,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:22,705 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 20:21:22,707 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 20:21:22,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 20:21:22,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:22,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 20:21:22,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 52 proven. 80 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-18 20:21:22,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 52 proven. 80 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-18 20:21:22,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610856311] [2023-12-18 20:21:22,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327652983] [2023-12-18 20:21:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327652983] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:22,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:22,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-18 20:21:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271402949] [2023-12-18 20:21:22,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:22,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 20:21:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 20:21:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-18 20:21:22,952 INFO L87 Difference]: Start difference. First operand 253 states and 306 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:23,300 INFO L93 Difference]: Finished difference Result 635 states and 748 transitions. [2023-12-18 20:21:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 20:21:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-18 20:21:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:23,301 INFO L225 Difference]: With dead ends: 635 [2023-12-18 20:21:23,301 INFO L226 Difference]: Without dead ends: 353 [2023-12-18 20:21:23,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 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 20:21:23,302 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:23,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:21:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-12-18 20:21:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 287. [2023-12-18 20:21:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.1468531468531469) internal successors, (328), 286 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2023-12-18 20:21:23,451 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 65 [2023-12-18 20:21:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:23,451 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2023-12-18 20:21:23,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2023-12-18 20:21:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-18 20:21:23,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:23,452 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 9, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:23,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-18 20:21:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 20:21:23,656 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1896640938, now seen corresponding path program 11 times [2023-12-18 20:21:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777679341] [2023-12-18 20:21:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:23,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:23,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422373278] [2023-12-18 20:21:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 20:21:23,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:23,666 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 20:21:23,668 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 20:21:23,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-12-18 20:21:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:23,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 20:21:23,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 244 proven. 106 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-18 20:21:23,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 230 proven. 120 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-18 20:21:23,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:23,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777679341] [2023-12-18 20:21:23,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:23,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422373278] [2023-12-18 20:21:23,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422373278] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:23,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:23,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2023-12-18 20:21:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955816991] [2023-12-18 20:21:23,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:23,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 20:21:23,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 20:21:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-12-18 20:21:23,999 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:24,301 INFO L93 Difference]: Finished difference Result 315 states and 357 transitions. [2023-12-18 20:21:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-18 20:21:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-12-18 20:21:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:24,302 INFO L225 Difference]: With dead ends: 315 [2023-12-18 20:21:24,302 INFO L226 Difference]: Without dead ends: 201 [2023-12-18 20:21:24,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 155 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-12-18 20:21:24,303 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:24,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 28 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:21:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-18 20:21:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 96. [2023-12-18 20:21:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 95 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2023-12-18 20:21:24,374 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 87 [2023-12-18 20:21:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:24,374 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2023-12-18 20:21:24,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2023-12-18 20:21:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-18 20:21:24,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:24,375 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:24,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 20:21:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 20:21:24,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:24,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1470374715, now seen corresponding path program 12 times [2023-12-18 20:21:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924232392] [2023-12-18 20:21:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:24,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:24,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948880837] [2023-12-18 20:21:24,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 20:21:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:24,600 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 20:21:24,600 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 20:21:24,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-12-18 20:21:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:21:24,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 20:21:25,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2023-12-18 20:21:25,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:21:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2023-12-18 20:21:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:21:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924232392] [2023-12-18 20:21:25,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:21:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948880837] [2023-12-18 20:21:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948880837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:21:25,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:21:25,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-12-18 20:21:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602125431] [2023-12-18 20:21:25,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:21:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 20:21:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:21:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 20:21:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-12-18 20:21:25,143 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:21:25,918 INFO L93 Difference]: Finished difference Result 449 states and 520 transitions. [2023-12-18 20:21:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-18 20:21:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-18 20:21:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:21:25,919 INFO L225 Difference]: With dead ends: 449 [2023-12-18 20:21:25,920 INFO L226 Difference]: Without dead ends: 388 [2023-12-18 20:21:25,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=954, Invalid=2828, Unknown=0, NotChecked=0, Total=3782 [2023-12-18 20:21:25,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 247 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 20:21:25,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 39 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 20:21:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-12-18 20:21:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 121. [2023-12-18 20:21:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 120 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2023-12-18 20:21:26,006 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 90 [2023-12-18 20:21:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:21:26,006 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2023-12-18 20:21:26,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:21:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2023-12-18 20:21:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-18 20:21:26,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:21:26,006 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 12, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:21:26,014 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 20:21:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 20:21:26,211 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:21:26,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:21:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 623143881, now seen corresponding path program 13 times [2023-12-18 20:21:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:21:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283569493] [2023-12-18 20:21:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:21:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:21:26,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:21:26,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124995254] [2023-12-18 20:21:26,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 20:21:26,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:21:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:21:26,221 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 20:21:26,223 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 20:21:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:21:27,173 WARN L260 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 201 conjunts are in the unsatisfiable core [2023-12-18 20:21:27,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:21:27,209 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 20:21:27,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 20:21:27,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:27,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-18 20:21:27,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:27,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-18 20:21:27,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:27,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-18 20:21:27,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:27,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-18 20:21:27,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:27,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-18 20:21:28,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:28,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-18 20:21:28,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:28,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-18 20:21:28,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:28,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-12-18 20:21:28,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:28,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-12-18 20:21:28,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:28,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-12-18 20:21:29,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:29,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-12-18 20:21:29,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:29,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2023-12-18 20:21:29,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:29,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2023-12-18 20:21:30,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 20:21:30,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 147 treesize of output 188 [2023-12-18 20:21:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:21:34,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:22:26,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1585 treesize of output 1561